Invalidity dossier

US 8881048

System and method for providing three-dimensional graphical user interface

Current assignee: SpaceTime3D, Inc.

Added 9/1/2026, 4:00:12 AM

IndustrySoftware Technology & Computing Systems (T)
At a glanceNo PTAB challenges3 lawsuits on fileasserted by SpaceTime3D, Inc.Software Technology & Computing Systems (T)

Active provider: DeepSeek · deepseek-v4-flash

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Each section takes ~30-60s with web-search grounding. Keep this tab open — sections will fill in below as they complete.

Patent summary

Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.

✓ Generated

I'll search the USPTO database and the CAFC dockets for patent 8881048, being careful not to conflate it with similar numbers.

The searches surfaced the key CAFC appeals (25-1022, 25-1051, 25-1082) and a recent Federal Circuit decision. Now let me pull the official abstract and independent claims from USPTO to complete the summary.

Summary — US Patent 8,881,048 B2 (US8881048B2)

Bibliographic data (from USPTO/Google Patents records)

Field Value
Patent number US 8,881,048 B2
Title System and method for providing three-dimensional graphical user interface
Inventor E. Eddie Bakhash (also listed as Eddie E. Bakhash / Ezra Eddie Bakhash), New York, NY
Original assignee (at filing) Individual (E. Eddie Bakhash)
Current assignee SpaceTime3D, Inc. (assignment recorded Nov. 6, 2014)
Application / filing date US 12/751,879 — filed Mar. 31, 2010
Issue date Nov. 4, 2014
Priority date Sep. 13, 2005 (Provisional 60/717,019)
Family lineage Continuation of US 11/531,676 (filed Sep. 13, 2006, now US 7,735,018)
Legal status Active – Reinstated; adjusted expiration Dec. 29, 2027
Primary classification G06F3/04815 (3D GUI interaction); also G06T15/20, G06F3/0481, G06F16/954

Abstract (from the family's published application; I could not independently verify the exact granted-patent abstract wording, but this is the standard published abstract): "Methods and systems are provided for an improved three-dimensional graphical user interface. In one embodiment, the method generally comprises: receiving an input from an end user, and capturing computing output from at least one computer source in response to the received end-user input. The computing output can be presented as two or more objects within a three-dimensional virtual space displayed to the end user. In one embodiment, the method further comprises generating a timeline that includes an icon for each object presented within the virtual space. In another embodiment, the method further comprises providing a database for storing and categorizing data regarding each object presented within the virtual space."

Plain-language overview of independent claims

The patent has 18 claims. Based on the Federal Circuit opinion (IPWatchdog, Aug. 31, 2026) and the IPR2023-00242 expert declaration (Fuchs, Ex-1003), the independent claims are approximately:

  • Claim 1 (method — independent): A method for providing a 3D GUI in which first and second webpages are rendered, images of them are captured and texture-mapped onto objects positioned at different depths in a simulated 3D space. When the user selects the first object, the 3D objects are replaced by a window in 2D space containing "the rendered first webpage" — construed by the PTAB and CAFC to mean the same previously rendered version from which the image was captured, not a newly re-rendered page. The user can interact with a link in that rendered page, and the resulting additional information is rendered and displayed in that same 2D window.

  • Claim 8 (system — independent): A system comprising a display screen, an input device, a processor module, and a memory module storing executable code to perform the claim-1-type method (receiving first and second inputs, receiving first and second webpages from one or more sources, capturing/texturing images onto 3D objects, and switching between the 3D representation and a 2D window).

  • Claim 14 (independent or lead claim of the 14–18 group): Similar subject matter but requires the 2D window to contain "the first webpage" — i.e., it is not limited to restoring the previously rendered version and encompasses a page rendered anew after user interaction, with foreground/background relationships between objects in 3D space.

Uncertainty note: I could not retrieve the complete verbatim text of every independent claim from an authoritative source in these searches. Claims 1, 8, and 14 are confirmed as to their core limitations via the CAFC opinion and IPR exhibits; the exact boundaries of claims 15–18 (and whether any other claim is independent) should be verified against the USPTO full-text of the patent.

CAFC dockets for this patent (per live search results)

The relevant Federal Circuit appeals were consolidated (order of Oct. 25, 2024) and concern IPRs on this patent:

  • 25-1022 (lead) — [Apple Inc.](/litigations/by-plaintiff/Apple%20Inc.), Google LLC v. SpaceTime3D, Inc. (appeal from PTAB; originating IPR IPR2023-00242)
  • 25-1051 (member case)
  • 25-1082 (cross-appeal) — SpaceTime3D, Inc. v. Apple Inc., Google LLC (filed Oct. 21, 2024)

Federal Circuit outcome (reported Aug. 31, 2026, per IPWatchdog — note this date is after your stated "current date" of Apr. 26, 2026, so treat it as reported by the search results): In a nonprecedential opinion by Judge Stark (joined by Judges Prost and Reyna), the CAFC affirmed the PTAB's split decision: claims 1–13 upheld (Apple failed to prove unpatentability), and claims 14–18 found obvious. The key construction was "the rendered first webpage" in claim 1, meaning the previously rendered version from which the image was captured. Apple's late-raised browser-caching theory was properly rejected, and the Sauve–Tsuda combination failed to show the "previously rendered webpage" limitation. Claims 14–18 were affirmed as obvious because they do not require the "rendered" version.

Related proceedings (from Google Patents litigation links): Texas Eastern District Court cases 2:22-cv-00049 and 2:19-cv-00372; Texas Western District Court case 6:22-cv-00149; PTAB IPR2023-00577 and IPR2023-00242 (both with Final Written Decisions); IPR2020-01417 (settled).

Sources

Bottom line: US 8,881,048 B2 is SpaceTime3D's foundational 3D-GUI patent (inventor E. Eddie Bakhash, issued Nov. 4, 2014), covering rendering webpages as texture-mapped objects at different depths in a simulated 3D space with a 2D window fallback showing the previously rendered webpage. After the 2026 CAFC decision, claims 1–13 remain intact while claims 14–18 have been held obvious. If you need the verbatim claim text, I'd recommend pulling the USPTO full-text (PatFT/Patent Center) for the '048 patent directly.

Generated 9/1/2026, 4:00:57 AM

Cases on file (3)

Group view →

Specific litigation cases in our database that name US patent 8881048. The free-form analysis below may also discuss cases beyond this list.

Lawsuits filed per year

2019: 1 case'19'20'212022: 2 cases2'22
Cases asserting US 8881048, by filing year.

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

✓ Generated

I'll search for litigation involving US patent 8,881,048 across multiple sources.

I have good initial data. Let me dig deeper into the specific district court cases, filing dates, and current statuses.

Based on my searches (stopped at the step limit, but with sufficient corroborating sources), here is the litigation landscape for US Patent 8,881,048 ("the '048 patent"). I've flagged one date discrepancy at the end.

A. District Court Litigation (patent infringement)

1. SpaceTime3D, Inc. v. [[[Samsung Electronics Co.](/litigations/by-defendant/Samsung%20Electronics%20Co.), Ltd.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.) et al.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.%20et%20al.)

2. SpaceTime3D, Inc. v. [LG Electronics Inc.](/litigations/by-plaintiff/LG%20Electronics%20Inc.) et al.

3. SpaceTime3D, Inc. v. [Apple Inc.](/litigations/by-plaintiff/Apple%20Inc.)

B. Federal Circuit Appeals (relating to IPR2023-00242 on the '048 patent)

4. Apple Inc., Google LLC v. SpaceTime3D, Inc.

5. SpaceTime3D, Inc. v. Apple Inc., Google LLC (cross-appeal)

C. Related PTAB proceedings (validity challenges, not district-court litigation)

  • IPR2020-01417 — Samsung Electronics Co., Ltd. & Samsung Electronics America, Inc. v. SpaceTime3D, Inc. — Petition filed Aug. 4, 2020; challenging the '048 patent. Status: Terminated – Settlement.
  • IPR2023-00242 — Apple Inc. & Google LLC v. SpaceTime3D, Inc. — Filed Nov. 22, 2022; instituted Aug. 7, 2023; Final Written Decision June 13, 2024 (claims 1–13 not shown unpatentable; claims 14–18 obvious); now final after the CAFC appeals above.
  • IPR2023-00577 — LG Electronics Inc., LG Electronics U.S.A., Inc., & Google LLC v. SpaceTime3D, Inc. — Filed Feb. 10, 2023; instituted Aug. 7, 2023; Final Written Decision June 13, 2024 (per Unified Patents data; outcome details not retrieved in my searches — no CAFC appeal of this IPR appeared in the litigation links).

Key observations / flags

  1. Date discrepancy (flagged per operating rules): The task states "Current Date: April 26, 2026," but the system prompt states today is September 1, 2026, and the IPWatchdog report of the CAFC decisions in the '048 appeals is dated August 31, 2026. Because live search results are the ground truth, I have included the CAFC outcome as reported; if your governing "current date" is truly April 26, 2026, then the CAFC decisions (Aug. 31, 2026) would be future events and the appeals 25-1022/25-1051/25-1082 would still be pending.

  2. Status caveats: The Samsung and LG dockets are marked "Closed" (settlement), consistent with counsel profiles. The Apple case's ultimate disposition on the merits (post-transfer in Austin) was not verifiable from my searches — the most recent substantive events I confirmed are the 2023 claim-construction order and the May 2023 Sotera-style stipulation. If a final judgment or settlement has since been entered in 1:23-cv-00553, I could not confirm it from the available search results.

  3. No cases against other defendants (e.g., no Microsoft, Google-as-defendant, or other device-maker case involving the '048 patent appeared in the Unified Patents, Stanford NPE, or docket sources searched).

Generated 9/1/2026, 4:04:01 AM

Proceedings on file (0)

All PTAB activity →

AIA trial proceedings (IPR / PGR / CBM) filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced from the USPTO Open Data Portal and refreshed every six hours; each proceeding number deep-links to the PTAB E2E docket.

Current assignee: SpaceTime3D, Inc.

No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.

PTAB challenges

AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.

✓ Generated

I have strong data on IPR2023-00242 and IPR2020-01417. Let me verify the claim-level outcome of the IPR2023-00577 Final Written Decision (the joined LG/Google case) and the CAFC docket mapping before drafting.

Proceedings overview

**Three (3) inter partes reviews have been filed on US 8,881,048; all are closed: claims 14–18 were invalidated (two parallel FWDs, both affirmed by the Federal Circuit on 2026-08-31), claims 1–13 were sustained in both merits proceedings, and the remaining petition (IPR2020-01417) was settled pre-institution. There are zero active AIA proceedings, zero institution denials, and one caution flag: the USPTO ODP block in the prompt reports "no AIA trial proceedings on file," which is stale — the three IPRs below are confirmed by the FWDs themselves, PTAB dockets, and the CAFC record (see IPR2023-00242 FWD, Paper 51, acknowledging "IPR2020-01417, in which the petition was dismissed prior to institution," and the joinder order in IPR2023-00577). Bottom line for a defendant: this is a hardened-but-narrowed patent — claims 1–13 survived two IPRs and a CAFC appeal and will be hard to kill on the already-litigated art, but claims 14–18 are canceled outright, and claim 1 has been read narrowly ("the rendered first webpage" = the previously rendered version from which the image was captured), which is the most useful lever for a non-infringement defense today.

IPR2023-00242 — [Apple Inc.](/litigations/by-plaintiff/Apple%20Inc.) & Google LLC v. SpaceTime3D, Inc.

  • Type: Inter Partes Review
  • Filed: 2022-11-22
  • Status: Final Written Decision (Paper 51, 2024-06-13); Director Review denied (Paper 53, 2024-08-06); CAFC affirmed 2026-08-31. Closed.
  • Judge panel: David C. McKone, Sheila F. McShane, Frederick C. Laney (FWD caption: "Before DAVID C. McKONE, SHEILA F. McSHANE, and FREDERICK C. LANEY, Administrative Patent Judges"). Note: Patexia's docket summary lists "Hubert C. Lorin" as writing judge, which conflicts with the FWD caption; I treat the FWD caption as authoritative.
  • Petition grounds (all 18 claims, 35 U.S.C. § 103(a), pre-AIA):
    • Ground 1: Claims 1–18 obvious over Robertson (US 6,414,677) + Gralla (How the Internet Works, 6th ed. 2002) + Gettman (US 2005/0086612);
    • Ground 2: Claims 1–18 obvious over Sauve (US 2006/0230356) + Tsuda (US 6,577,330).
    • Supported by the Fuchs Declaration (Ex-1003); Patent Owner responded with the Bakhash Declaration (Ex-2001) and Schaefer Declarations (Ex-2014, Ex-2023).
  • Institution decision: Instituted (Paper 11, 2023-06-16) — all 18 claims, both grounds. Google LLC was joined as a party (collectively "Petitioner" with Apple) via the joinder in IPR2023-00577.
  • Final Written Decision (Paper 51, 2024-06-13): Split verdict. "we determine that Petitioner has demonstrated, by a preponderance of the evidence, that claims 14–18 are unpatentable, but has not demonstrated that claims 1–13 are unpatentable." Patent Owner's Motion to Exclude was dismissed as moot. The pivot was claim construction: the Board construed "the rendered first webpage" (claim 1) to mean "the rendered version from which the corresponding image was captured" — i.e., the 2D window must restore the previously rendered page, not re-render it. Robertson and Gettman were found to render a webpage only in response to the user's selection, and Sauve/Tsuda likewise failed to teach restoration of the previously rendered version. Claims 14–18, which recite only "the first webpage" (no rendering/antecedent limitation), fell on both grounds. Canceled: claims 14, 15, 16, 17, 18. Sustained: claims 1–13.
  • Settlement / termination: None between the parties — the case went to a full trial (video hearing 2024-03-18, Paper 44) and FWD. (LG's parallel case settled separately; see IPR2023-00577.)
  • Appeal: Yes. Apple/Google appealed (CAFC 25-1022, lead, and 25-1051, member); SpaceTime3D cross-appealed (CAFC 25-1082, notice filed 2024-10-14, docketed 2024-10-21). The three appeals were consolidated by order dated 2024-10-25. Oral argument was heard ~2026-07-06. On 2026-08-31, in a nonprecedential opinion by Judge Stark (joined by Prost and Reyna), the CAFC affirmed the Board in full on the '048 patent: claims 1–13 sustained and claims 14–18 obvious. The court adopted the "previously rendered version" construction, rejected Apple's late-raised browser-caching theory (new art/argument first raised in reply), and rejected SpaceTime3D's cross-appeal argument that "the first webpage" in claim 14 should be construed like "the rendered first webpage" in claim 1.
  • Defensive value: High on two fronts. (1) Claims 14–18 are dead — any infringement theory built on them is now sanction-bait; quote the FWD and the CAFC affirmance. (2) Claims 1–13 are alive but narrowed — the "rendered first webpage" construction gives you a clean non-infringement argument if the accused product re-renders the page (or fetches it fresh) rather than restoring the exact previously rendered version whose image was captured. Expect SpaceTime3D to assert claims 1 and 8 (the independent method/system claims).

FWD: DocketAlarm (Paper 51) — http://ocr.docketalarm.com/cases/PTAB/IPR2023-00242/Apple_Inc._v._SpaceTime3D_Inc/docs/06-13-2024-Board/Final_Written_Decision__original-51-Final_Written_Decision__original.pdf · CAFC: CourtListener docket 25-1022 — https://www.courtlistener.com/docket/73575988/apple-inc-v-spacetime3d-inc/ ; IPWatchdog summary — https://ipwatchdog.com/2026/08/31/spacetime3d-mixed-results-federal-circuit-appeals-apple-google-iprs/

IPR2023-00577 — [LG Electronics Inc.](/litigations/by-plaintiff/LG%20Electronics%20Inc.), LG Electronics U.S.A., Inc. & Google LLC v. SpaceTime3D, Inc.

  • Type: Inter Partes Review
  • Filed: 2023-02-10
  • Status: Institution granted with joinder (2023-08-07); LG entities terminated by settlement (2023); Final Written Decision (Paper 16, 2024-06-13) — same day as the joined IPR2023-00242 FWD. Closed.
  • Judge panel: Institution panel — Hubert C. Lorin, David C. McKone, Minn Chung ("Before HUBERT C. LORIN, DAVID C. McKONE, and MINN CHUNG"; Lorin authored the institution decision). Panel changed 2023-09-25 and again 2024-05-23 (panel-change notice, Paper 15); I could not independently confirm the FWD panel from the search results, so I will not name one.
  • Petition grounds: Identical to the Apple IPR — claims 1–18, § 103(a): (1) Robertson + Gralla + Gettman; (2) Sauve + Tsuda (Fuchs Declaration, Ex-1003). Patent Owner's Preliminary Response pressed § 325(d) (cumulative of prosecution art) and substantive deficiencies (Ex-2001 Bakhash Declaration).
  • Institution decision: Granted (2023-08-07) — "we determine institution of inter partes review of all challenged claims of the '048 patent is warranted on the same grounds instituted in the Apple IPR, and we grant Petitioner's Motion for Joinder" — joining Google to IPR2023-00242 under 35 U.S.C. § 315(c).
  • Final Written Decision (Paper 16, 2024-06-13): Same-day, same-grounds decision tracking the joined IPR2023-00242 outcome. Patexia's docket summary records "Claims Invalidated: 14, 15, 16, 17, 18" and outcome "Unpatentable." Caveat: I could not retrieve the verbatim 00577 FWD text to quote it directly; the claim-level outcome stated here is consistent with (a) the identical instituted grounds and joinder into 00242, (b) the same-day FWD entry, and (c) Patexia's claim-level data. If you need the exact FWD language, pull Paper 16 from PTAB E2E.
  • Settlement / termination: LG Electronics Inc. and LG Electronics U.S.A., Inc. settled with SpaceTime3D — Joint Motion to Terminate as to LGE (Paper 8, filed 2023-05-09) granted (Paper 12); the corrected settlement agreement (Ex-1056) was filed as business-confidential with a joint request to keep it separate, per 37 C.F.R. § 42.74 — terms are confidential and not publicly disclosed. Google LLC remained as the sole petitioner and continued the trial through the FWD.
  • Appeal: Patexia maps the appeal of this FWD into the consolidated CAFC docket 25-1082 (SpaceTime3D's cross-appeal, consolidated with 25-1022/25-1051). The CAFC's 2026-08-31 affirmance resolves the joined IPR family. Caveat: SpaceTime3D's cross-appeal notice I retrieved expressly cites only IPR2023-00242 Paper 51; if 00577 was separately cross-appealed, I could not confirm the separate notice.
  • Defensive value: Confirms the 00242 result was not panel-specific — two PTAB panels, one merits outcome. For a defendant facing LG or Google (or their privies), note the LG settlement means LG's posture differs from Google's (LG was terminated pre-FWD; Google went through trial). The practical takeaway is the same as 00242: claims 14–18 canceled, claims 1–13 survived.

Institution/joinder order: http://ocr.docketalarm.com/cases/PTAB/IPR2023-00242/Apple_Inc._v._SpaceTime3D_Inc/docs/08-07-2023-Board/Notice__Other-14-Institution_decision_and_grant_of_joinder,_IPR2023_00577.pdf · Patexia summary: https://services.patexia.com/lawsuits/LG-Electronics-Inc--et-al-v-SpaceTime3D-Inc-id-[186525](/patent/186525)

IPR2020-01417 — [[Samsung Electronics Co.](/litigations/by-defendant/Samsung%20Electronics%20Co.), Ltd.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.) & Samsung Electronics America, Inc. v. SpaceTime3D, Inc.

  • Type: Inter Partes Review
  • Filed: 2020-08-04
  • Status: Terminated – Settled (Board order, Paper 22, 2021-03-15: "Settlement Prior to Institution of Trial" under 37 C.F.R. § 42.74). Dismissed before any institution decision.
  • Judge panel: Brian McNamara, Jennifer Meyer Chagnon, Terrence McMillin.
  • Petition grounds (per the Bajaj Declaration, Ex-1024): Claims 1–18 obvious under § 103(a) over Miller (US 6,229,542) + Miramar (Light & Miller, "Miramar: A 3D workplace," Sept. 2002) + Hennings (US 2004/0215664); and claims 2–4, 9–11, 16–18 obvious over Miller + Miramar + Hennings + Holecek (US 8,341,541).
  • Institution decision: None — the case settled before the Board ruled. Patent Owner had opposed institution on Fintiv § 314(a) grounds (the parallel E.D. Tex. case, 2:19-cv-00372-JRG, had a trial date earlier than the projected FWD), and the parties jointly moved to dismiss (Paper 20, 2021-03-10), representing that the related district-court suit was being dismissed concurrently and that "the parties have settled all disputes relating to the '048 patent."
  • Final Written Decision: None.
  • Settlement / termination: Joint Motion to Dismiss (Paper 20, 2021-03-10); dismissed 2021-03-15. The settlement agreement was filed as a confidential exhibit with a joint request to keep it separate — terms confidential. No appeal (no FWD).
  • Defensive value: This is the one IPR that produced no merits decision and no estoppel (35 U.S.C. § 315(e)(2) estoppel attaches only to an IPR that results in a final written decision). Samsung's Miller/Miramar/Hennings/Holecek combination was never adjudicated and remains available to a new petitioner who is not Samsung's privy. For a defendant today, this is the most promising untested art line against claims 1–13 — but note it faces the same "previously rendered version" problem that killed Robertson/Gralla/Gettman and Sauve/Tsuda, so the art must be developed to teach restoration of the previously rendered page, not re-rendering on selection.

Joint Motion to Dismiss: https://www.docketalarm.com/cases/PTAB/IPR2020-01417/Samsung_Electronics_Co._Ltd._v._SpaceTime3D_Inc/docs/03-10-2021-Petitioner/Motion-20-Joint_Motion_to_Dismiss_Inter_Partes_Review.pdf

Related (non-AIA) Office proceeding — flag

The IPR2023-00242 FWD notes the '048 patent is also subject to ex parte reexamination 90/019,353, which the Board stayed pending the IPR. As of the parties' April 2024 meet-and-confer (Ex-3003), SpaceTime3D sought to keep the reexamination stayed through the FWDs while Apple/Google opposed an unconditional stay. I could not confirm the current (post-FWD/post-CAFC) status of 90/019,353 — check PAIR/Patent Center before relying on it. Reexamination is not an AIA proceeding and is not a defendant-side tool, but a resumed reexamination could produce additional claim amendments or cancellations.

Strategic summary

Claim map — CANCELED vs. SUSTAINED vs. UNTESTED. All 18 claims of US 8,881,048 have now been through AIA trial. CANCELED: claims 14, 15, 16, 17, 18 (IPR2023-00242 FWD Paper 51; mirrored in IPR2023-00577 FWD Paper 16; affirmed by the CAFC in 25-1022/-1051/-1082 on 2026-08-31). SUSTAINED: claims 1–13, twice, on both § 103 grounds, with the CAFC expressly rejecting Apple's browser-caching theory and the Sauve–Tsuda combination. UNTESTED: none. That said, the surviving claims are materially narrower than the claim language suggests: the PTAB/CAFC construction of "the rendered first webpage" (the previously rendered version from which the corresponding image was captured) means claim 1 (and dependent claims) do not cover the common "thumbnail → re-render on click" pattern. Claims 8 (system) tracks claim 1 and inherits the same construction battle; claim 14's group is gone.

Estoppel landscape (35 U.S.C. § 315(e)(2)). Apple and Google went to FWD in IPR2023-00242/-00577 and are estopped in district court and ITC from raising — against the challenged claims — any ground they raised or reasonably could have raised, including the Robertson/Gralla/Gettman and Sauve/Tsuda combinations and the untested variants of those references. Apple separately signed a Sotera-style stipulation (2023-05-24, Ex-1054) in the W.D. Tex. case (1:23-cv-00553-ADA-DH), agreeing not to pursue any instituted IPR ground or any ground reasonably raisable in an IPR in that district case. LG was terminated pre-FWD by settlement — its § 315(e)(2) posture is weaker/arguable; Samsung's IPR never resulted in a FWD, so no estoppel attaches to Samsung or anyone else from IPR2020-01417. For a new defendant (not in privity with Apple, Google, LG, or Samsung), statutory estoppel is not a bar at all — you may raise any ground, including the twice-litigated combinations, but the smarter play is the never-adjudicated Miller/Miramar/Hennings/Holecek line from Samsung's abandoned petition (developed to meet the "previously rendered version" limitation) plus any art not "reasonably available" to the Apple IPR petitioners.

Pattern signals. SpaceTime3D is a small-company NPE (per Unified Patents' taxonomy) that has systematically enforced this patent family (7,735,018; 8,881,048; 9,304,654; 9,696,868) against Samsung, LG, and Apple — three district-court campaigns, each accompanied by IPRs (Samsung's settled pre-institution; LG's settled as to LG with Google pressing on; Apple's went to trial). The patent owner litigated the PTAB phase aggressively — expert declarations from the inventor and Dr. Schaefer, a motion to exclude, Director Review (denied 2024-08-06), and a CAFC cross-appeal — and it has won on claims 1–13. The family has now produced a stack of IPRs and reexaminations (90/019,351–353), and the CAFC has affirmed the Board in every 2026 decision. Expect SpaceTime3D to continue asserting claims 1 and 8 against new targets; expect the "rendered first webpage" construction and the canceled 14–18 group to be the center of every dispute.

Recommended next steps

  1. If a demand letter cites claims 14–18, respond in writing immediately. Those claims are canceled by the IPR2023-00242 FWD (Paper 51, 2024-06-13) and IPR2023-00577 FWD (Paper 16, 2024-06-13), affirmed by the CAFC in Apple Inc., Google LLC v. SpaceTime3D, Inc., No. 25-1022 (Fed. Cir. 2026-08-31). Quote the FWD's disposition verbatim: "we determine that Petitioner has demonstrated, by a preponderance of the evidence, that claims 14-18 are unpatentable, but has not demonstrated that claims 1-13 are unpatentable." A theory built on canceled claims is sanction-bait under Rule 11.
  2. If the letter cites claims 1 or 8, build the non-infringement case around the "rendered first webpage" construction (the rendered version from which the corresponding image was captured — the previously rendered, static version, not a newly rendered "live" page). Show that your product re-renders or re-fetches the page on selection (fresh HTTP request, current DOM, live state) rather than restoring the exact captured version. This is the precise distinction that saved claims 1–13 from Robertson/Gettman and Sauve/Tsuda.
  3. If you are not in privity with Apple/Google/LG/Samsung, you are not estopped — but don't waste money re-running the two losing combinations. The strongest untested line is Samsung's abandoned Miller/Miramar/Hennings/Holecek combination from IPR2020-01417 (no FWD, no estoppel), developed to address the "previously rendered version" limitation. Supplement with art that was not before the Apple IPR.
  4. If you are Apple, Google, or a privy, respect the § 315(e)(2) and Sotera estoppel lines — the available § 102/103 grounds against claims 1–13 are effectively limited to art that was not reasonably available at the time of the Apple IPR; § 101 and § 112 defenses remain available.
  5. Monitor ex parte reexamination 90/019,353 (stayed during the IPR) for post-FWD developments, and confirm the current status of the W.D. Tex. case 1:23-cv-00553-ADA-DH on the district docket before any settlement or licensing negotiation.
  6. No active AIA proceedings exist, so there are no pending PTAB milestones to calendar — the statutory one-year trial clock has fully run in all three IPRs. If SpaceTime3D files a new suit, your realistic IPR window is the statutory one-year bar from service of the complaint (35 U.S.C. § 315(b)); start art development now.

Generated 9/1/2026, 4:48:43 AM

Ownership chain (2)

Asserters network →

Structured records extracted from the assignment-history narrative below. Each entity links to its full ownership-network profile.

  1. ? · recorded 2014-11-06 · Assignment

    E. Eddie BakhashSPACETIME3D, INC.

    acquisition

  2. 2016-02-22 · Assignment

    E. Eddie BakhashSPACETIME3D, INC.

    Correspondent: Todd Fitzsimmons · Fitzsimmons IP Law

    internal reorg

Assignment history

Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.

✓ Generated

I've hit my search-step budget, so here is the assignment-chain reconstruction based on the records I was able to verify, with explicit flags where the USPTO reel/frame could not be retrieved.

Inventors

  • E. Eddie Bakhash (also recorded as Ezra Eddie Bakhash / Eddie E. Bakhash) — sole named inventor on US 8,881,048. Address on the patent face: New York, NY (US); a later family assignment gives his residence as 2335 Waverley Street, Palo Alto, CA 94301.
  • Employer at time of filing: Bakhash is the founder/principal of the assignee SpaceTime3D, Inc. — he signed the Feb. 22, 2016 family assignment as "E. Eddie Bakhash, President of Spacetime3D, Inc." (file history of US 9,304,654, a continuation in the same family). In his IPR declaration (IPR2020-01417, Ex. 2001, ¶11) he states SpaceTime3D released the "SpaceTime" 3D browser in 2007.
  • Unusual pattern check: Not present. The "inventors depart the original assignee within 12 months, then portfolio fire-sale" pattern does not apply — the inventor is the assignee's principal, and the sole inventor stayed with the company through the 2026 CAFC appeals.

Original assignee

  • Entity named on the issued patent: The '048 patent issued unassigned — the front page lists the inventor/applicant as an individual ("E. Eddie Bakhash, New York, NY (US)"; Google Patents records "Application filed by Individual"). The corporate assignee SPACETIME3D, INC. appears only via the post-issuance assignment recorded 2014-11-06, two days after grant.
  • Product / line of business: SpaceTime3D, Inc. (576 Fifth Avenue, Suite 1102, New York, NY 10036 — a commercial office address, not a registered-agent service) built and shipped the "SpaceTime" 3D web browser in 2007, which Bakhash avers embodied the claimed 3D/2D toggle, and which received press coverage (San Jose Mercury News, Washington Post, WSJ, Economist, Popular Science, PC World, TechCrunch, etc.).
  • Current status: Still an active legal entity and patent owner (patent owner in IPRs 2020-01417, 2023-00242, 2023-00577 and appellee/cross-appellant in CAFC 25-1022/25-1051/25-1082 through the Aug. 31, 2026 decision). No evidence retrieved that the SpaceTime browser is currently sold; Unified Patents' PTAB portal classifies the entity as "NPE (Small Company)".

Assignment timeline

Verified events:

  • Executed on or before 2014-11-06 / recorded 2014-11-06 — Reel/frame not retrievable from the sources I could access (Google Patents legal events do not display the reel/frame; I could not pull the USPTO Assignment Center record directly within the search budget).
    • Conveyance: Assignment of Assignor's Interest ("ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS)" per Google Patents)
    • Assignor: E. Eddie Bakhash (individual)
    • Assignee: SPACETIME3D, INC.
    • Correspondent: not shown in the records I could verify — flag: unverified.
    • Context: Transfer of the just-issued '048 patent from the inventor to his own operating company, recorded 2 days after grant. This is the only assignment event Google Patents lists for the '048 patent itself.

Related family assignment (same chain, same correspondent — not a '048-record assignment):

  • Executed 2016-02-22 / recorded per file history of US 9,304,654 (app. 14/503,142, a continuation of the '048 family) — Reel/frame not shown in the OCR'd file-history exhibit (IPR2023-00578, Ex. 2005).
    • Conveyance: Assignment (NEW ASSIGNMENT)
    • Assignor: E. Eddie Bakhash (signed as Assignor, and countersigned as President of SpaceTime3D, Inc.)
    • Assignee: SPACETIME3D, INC., 576 Fifth Ave., Suite 1102, New York, NY 10036
    • Correspondent: Todd Fitzsimmons, Fitzsimmons IP Law (submitter; attorney docket 747121-3). Recurrence flag: Fitzsimmons (Reg. No. 44,683) is also SpaceTime3D's counsel of record in its IPRs — the same attorney handles both the family's assignment filings and its assertion defense.
    • Context: Inventor-to-own-company assignment for the continuation application in the same portfolio — an internal family transfer, not a sale to a third party.

Negative finding: No recorded assignment out of SpaceTime3D was found in any source searched — no sale to an aggregator, no security agreement, no merger, no license, no release. If the USPTO Assignment Center shows additional records (e.g., a lien/security interest), that would be the place to catch them; I could not query it directly within this session.

Timeline diagram

timeline
    title Ownership of US 8881048
    2005 : Provisional filed
    2006 : Parent application filed
    2007 : SpaceTime browser released
    2010 : 048 application filed
    2014 : Patent issued
         : Assigned to SpaceTime3D Inc
    2016 : Family assignment to SpaceTime3D
    2019 : First infringement suit vs Samsung
    2022 : Suits vs LG and Apple
    2024 : PTAB invalidates claims 14 to 18
    2026 : CAFC affirms split outcome

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The patent moved once, from the inventor directly to SpaceTime3D, Inc. — a company that actually shipped a product embodying the claims (the 2007 SpaceTime 3D browser, per Bakhash Decl., IPR2020-01417 Ex. 2001 ¶11) and that operates from a commercial office address (576 Fifth Ave., NYC). This is not an "IP/Holdings/Ventures" licensing shell.

  2. Known asserter in the chain — present (weak form). SpaceTime3D is not on the named aggregator lists (Acacia, Marathon, IV, Wi-LAN, etc.), but it is surfaced as an NPE by Unified Patents: the Unified Patents PTAB portal tags "Spacetime3d Inc" as "NPE (Small Company)" in the case-list rows for IPR2023-00242 and IPR2023-00577 (both on the '048 patent). It is also a repeat plaintiff: E.D. Tex. 2:19-cv-00372 (Samsung, 2019), E.D. Tex. 2:22-cv-00049 (LG, 2022), W.D. Tex. 6:22-cv-00149 (Apple, 2022).

  3. Repeat correspondent across the chain — not present as a chain signal (the '048 chain has only one recorded link), but note the family pattern: Todd Fitzsimmons (Fitzsimmons IP Law, Reg. No. 44,683) filed the 2016 family assignment (docket 747121-3) and appears as SpaceTime3D's IPR counsel. That is one firm serving one client — normal for a small company, not a multi-LLC laundering pattern.

  4. Cascading transfers — not present. Exactly one inventor→company transfer (Nov. 2014) plus one same-party family assignment (Feb. 2016). No chained LLCs, no shared registered-agent addresses.

  5. Pre-litigation transfer — not present. The assignment (recorded 2014-11-06) predates the first infringement suit (Samsung, filed 2019-11-14) by roughly five years — the chain was not arranged to set up the litigation.

  6. Bankruptcy fire-sale — not present. No Chapter 7/11, no court-supervised patent sale.

  7. Privateering — not present / unclear. No evidence SpaceTime3D asserts on behalf of a covert operating-company principal; it asserts its own patents in its own name.

  8. Defensive aggregator (anti-NPE) — not present. The chain terminates at SpaceTime3D, an asserting entity. No RPX/AST/LOT/Unified/OIN involvement.

Verdict

NPE — moderate confidence.

The ownership chain itself is clean — a single inventor-to-own-company transfer (recorded 2014-11-06) with no shells, no cascades, and no pre-litigation maneuvering — which rules out the classic NPE plumbing patterns. What pushes this toward NPE classification is the behavior of the current assignee: Unified Patents classifies SpaceTime3D as an "NPE (Small Company)" in its PTAB data for the very IPRs on this patent (IPR2023-00242, IPR2023-00577), and SpaceTime3D has since 2019 pursued a monetization pattern of infringement suits against Samsung, LG, and Apple (with Samsung and LG settling) while no evidence shows the 2007 SpaceTime browser is still in commerce. That makes it a product-company-turned-assertion-vehicle — moderate confidence, not high, because the assignee did genuinely ship a product embodying the claims and is not a shell, and because I could not verify the USPTO Assignment Center reel/frame records or rule out additional liens/agreements.

Verify at: https://assignmentcenter.uspto.gov/ (search Patent No. 8881048; confirm the 2014-11-06 assignment's reel/frame and check for any un-surfaced security agreements or releases).

Generated 9/1/2026, 4:48:14 AM

Prior art

Earlier patents, publications, and products that may anticipate or render the claims unpatentable.

✓ Generated

I'll research the prior art cited on the face of US 8,881,048 by searching for its reference list and related records.

The searches surfaced the IPR prior art (Robertson, Gralla, Gettman, Sauve, Tsuda), but I need the examiner-cited "References Cited" list printed on the face of the '048 patent. Let me dig for that specific list.

I need the exact "References Cited" section from the granted '048 patent. Let me try to locate the Google Patents citations section and the IPR petition's prior-art list.

I've reached the tool-call limit, so I'll now synthesize the answer from the verified search results, with explicit flags wherever bibliographic details could not be confirmed.

Prior-Art Analysis — US 8,881,048 B2 ("System and method for providing three-dimensional graphical user interface")

0. Patent identity verification

Searches for the number 8881048 (and variants "8,881,048", "US8881048B2") consistently returned only the correct patent:

  • US 8,881,048 B2 — System and method for providing three-dimensional graphical user interface
  • Inventor: E. Eddie Bakhash; filing: Mar. 31, 2010 (US 12/751,879); issue: Nov. 4, 2014; priority: Sep. 13, 2005 (prov. 60/717,019); parent: US 7,735,018 (US 11/531,676, filed Sep. 13, 2006); assignee: SpaceTime3D, Inc.
  • Family members located: US20110029907A1 (published application), EP1932141A2/A4, WO2007033354A2/A3, CA2621488A1, CN101300621A/B, JP2009508274A, and continuations US9304654B2, US9696868B2, US11112931B2.

No similar-number patent (e.g., 8,881,048 vs. 888,104 vs. 8,880,xxx) was returned in place of the target.

1. Framing: what "most relevant prior art" means for this patent

There are two distinct sets of "citations" for the '048 patent, and I'll address both:

  1. The post-grant validity record (the strongest evidence of "most relevant prior art") — the prior art litigated in IPR2023-00242 ([Apple Inc.](/litigations/by-plaintiff/Apple%20Inc.), Google LLC v. SpaceTime3D, Inc.), which produced a Final Written Decision (June 13, 2024) affirmed by the Federal Circuit on Aug. 31, 2026 (Cases 25-1022/25-1051 and cross-appeal 25-1082). Per the CAFC opinion: Apple challenged claims 1–18 "principally relying on combinations of the Robertson, Gralla and Gettman references, as well as a second combination based on Sauve and Tsuda."
  2. Non-patent literature cited in the family's international phase (EP1932141A4 lists two NPL items: Karam 1994; De Pauw et al. 1998).

Important legal caveat up front: The PTAB/CAFC record did not find that any single reference anticipates any claim under § 102. The Board held claims 1–13 not shown unpatentable (so no anticipation and no obviousness), and held claims 14–18 obvious under § 103 only in combination. The § 102 "potential anticipation" analysis below is therefore my assessment of how close each reference comes to a single-reference knockout, not a finding from the record.

2. The most relevant prior art (IPR2023-00242 / CAFC 25-1022 record)

2.1 Robertson

  • Citation: "Robertson" — full bibliographic citation not confirmed in the available search results. In the CAFC record it appears as Appx39, described as showing an "Internet Explorer browser rendering a webpage in its window." It is one of Apple's three principal references (with Gralla and Gettman).
  • Date: Not confirmed in the retrieved snippets (necessarily pre-2005 to be prior art to the Sep. 13, 2005 priority date).
  • Brief description (per CAFC/Board): Discloses a GUI in which webpage representations (thumbnails/images) are arranged in a 3D space; upon user selection of a representation, the corresponding webpage is rendered in a 2D browser window. The Board found Robertson renders the webpage in response to the user's selection rather than restoring the previously rendered version from which the thumbnail was captured — the exact limitation ("the rendered first webpage") that saved claims 1–13.
  • Claims potentially anticipated (§ 102): Robertson is the closest single-reference candidate for the claim 14 genus (which recites "the first webpage" without the "rendered" antecedent). It plausibly maps to limitations [14a]–[14d] (receiving inputs; receiving webpages; displaying texture-mapped images at different depths in 3D space with foreground/background objects; replacing the 3D objects with a 2D window containing the first webpage). However, no anticipation finding was made — Robertson was only used in the combination that made claims 14–18 obvious. For claims 1–13, Robertson cannot anticipate because the CAFC confirmed it lacks "the rendered first webpage" (restore-the-previously-rendered-version) limitation.
  • Source: IPWatchdog (Aug. 31, 2026); CourtListener Dkt. 21 (Apple's CAFC brief) quoting "Robertson (Appx39)."

2.2 Gettman

  • Citation: "Gettman" — full citation not confirmed; appears in the CAFC record as Appx40, described as a "'two dimensional, conventional-style browser display box' rendering a webpage."
  • Date: Not confirmed.
  • Brief description: Discloses a conventional 2D browser display box/window rendering a webpage — i.e., the "window within a two-dimensional (2D) space" element of the combination.
  • Claims potentially anticipated (§ 102): Gettman alone discloses only a 2D browser window rendering a webpage; it does not alone disclose the 3D space, texture-mapped depth-arranged objects, or the replace-3D-with-2D transition. It therefore does not appear to anticipate any independent claim single-handedly; it supplied the 2D-window limitation for the § 103 combination underlying claims 14–18. As with Robertson, the Board found Gettman renders a webpage in response to selection rather than restoring a previously rendered version, so it also fails the claim-1 "rendered first webpage" limitation.
  • Source: CourtListener Dkt. 21 quoting "Gettman (Appx40)."

2.3 Gralla

  • Citation: "Gralla" — full citation not confirmed in the retrieved material. Identified only as part of Apple's primary Robertson–Gralla–Gettman combination.
  • Date: Not confirmed.
  • Brief description: The available CAFC summaries do not describe Gralla's individual disclosure in detail; it functions within the combination (likely supplying a webpage-thumbnail or 3D-arrangement teaching). I cannot responsibly characterize its standalone disclosure beyond this, and I could not confirm its exhibit/appendix number.
  • Claims potentially anticipated (§ 102): Cannot be assessed reliably from the retrieved record; no anticipation finding was made against it.

2.4 Sauve (Ex-1007)

  • Citation: Confirmed as Ex-1007 in IPR2023-00242. Full patent/publication number not confirmed in my searches. (I am deliberately not guessing a patent number.)
  • Date: Not confirmed (pre-2005 to be § 102 prior art to the priority date).
  • Brief description (per PTAB decision as quoted by CourtListener): A browser "quick pick" user interface (Sauve Fig. 4) displaying a grid of webpage thumbnails; selecting a thumbnail switches to a tabbed window showing the webpage content for the in-focus tab (Sauve Fig. 5). This teaches the "window within a 2D space" that replaces the thumbnail/quick-pick view — the core of limitation [1dii]. Critically, the Board found Sauve loads/renders the webpage anew in the tab window; it does not display the same previously rendered version from which the thumbnail was captured (Apple's expert could not adequately explain otherwise).
  • Claims potentially anticipated (§ 102): Sauve alone maps well to the 2D-window-replacement and link-interaction aspects of claims 1, 8, and 14, but it is a 2D-only interface — it does not alone disclose the "simulated three-dimensional space," depth positioning, or foreground/background relationship, so it cannot anticipate any independent claim standing alone. Its role was supplying the 2D-window limitation in the Sauve–Tsuda § 103 combination.
  • Source: CourtListener Dkt. 18 (PTAB FWD excerpts: "Petitioner contends that Sauve teaches ... switching from the quick pick user-interface (shown in Sauve's Figure 4) and a tabbed window showing the webpage content for an in-focus tab (shown in Sauve's Figure 5)"; "Ex. 1007 ¶¶ 43–44").

2.5 Tsuda (Ex-1008)

  • Citation: Confirmed as Ex-1008 in IPR2023-00242. Full patent/publication number not confirmed (column/line cites "2:57–67" indicate a patent or published application).
  • Date: Not confirmed.
  • Brief description (per PTAB decision as quoted by CourtListener): Discloses windows arranged in a 3D stack/space (Figs. 11B–12C), where a window occupies a plane forward in the stack ("first object in a foreground") relative to a window further left/back ("second object in a background"); an active window can be displayed "facing the front" in 3D space. This supplies the claimed 3D-space depth/foreground-background arrangement.
  • Claims potentially anticipated (§ 102): Tsuda alone teaches the 3D arrangement but — per the PTAB's discussion of Patent Owner's arguments — interacting with a window results in it facing front within the 3D space, not in a 2D window replacing the 3D objects. Thus Tsuda alone cannot anticipate the 2D-window-replacement limitation of claims 1, 8, or 14. It was the 3D-space half of the Sauve–Tsuda combination underlying the claims 14–18 obviousness holding.
  • Source: CourtListener Dkt. 18 (PTAB FWD: "Dr. Fuchs testifies that '[i]n Figures 11B–12C, Tsuda's windows...'"; "Ex. 1008, 2:57–67"; "using Tsuda to function as a quick pick user-interface would not result in an active window in 2D space 'replacing' a plurality of images in 3D space").

3. Non-patent literature cited in the family (EP1932141A4)

The international/counterpart file history lists two NPL references (both confirmed on the EP family page):

  1. Karam, G.M. — "Visualization Using Timelines," Proceedings of the International Symposium on Software Testing and Analysis (ISSTA), Seattle, Aug. 17–19, 1994, pp. 125–137 (ACM; XP000476876).
    • Description: Visualization of program/software behavior using timeline metaphors.
    • § 102 relevance: Antedates the Sep. 13, 2005 priority date and qualifies as § 102(a) prior art. However, it concerns software-testing timeline visualization, not the issued claims' core combination (webpage rendering → texture-mapped 3D objects at different depths → 2D-window replacement). It relates to the specification's timeline/visual-history disclosure (e.g., "timeline 340"), which is not reflected in the issued claims 1–18. No § 102 anticipation of any issued claim.
  2. De Pauw, W.; Lorenz, D.; Vlissides, J.; Wegman, M. — "Execution Patterns in Object-Oriented Visualization," Proc. Fourth Conference on Object-Oriented Technologies and Systems (COOTS '98), Santa Fe, NM, Apr. 27–30, 1998, pp. 219–234 (USENIX; XP002534202).
    • Description: Visualizing object-oriented program execution via graphical patterns (timeline-like execution views).
    • § 102 relevance: Also antedates the priority date; same conclusion as Karam — relevant to the timeline/visual-history portion of the disclosure, not to the issued claims' limitations. No § 102 anticipation of any issued claim.

4. Other references surfaced (unconfirmed as citations on the '048 patent)

  • US20090299954A1 (Hoberman, "Document stream operating system with document organizing and display facilities," filed Nov. 21, 2003; published Dec. 3, 2009) and its family (including US6725427) appeared in searches because later Hoberman-family documents cite Bakhash's application US20070070066A1. These are potential § 102(a)/(e) prior art to the '048 filing date (Mar. 31, 2010) — but I could not confirm that either is printed on the '048 patent's "References Cited" page. Treat as unverified leads only.

5. Claim-by-claim § 102 anticipation assessment (summary)

Claims Status on the record Closest § 102 candidate Why anticipation fails (or is unproven)
1–13 (incl. indep. claims 1, 8) Upheld — not shown unpatentable (PTAB FWD, affirmed CAFC) None No single reference discloses restoring "the rendered first webpage" (the previously rendered version from which the image was captured). Robertson/Gettman render anew on selection; Sauve loads anew; Tsuda keeps the active window in 3D.
14–18 (claim 14 independent) Held obvious under § 103 over Robertson–Gralla–Gettman and Sauve–Tsuda combinations (affirmed CAFC) Robertson (closest single reference for claim 14, which omits the "rendered" antecedent) Even for claim 14, the Board decided the case on combinations; no single-reference anticipation was found. Robertson alone would need to disclose every limitation of claim 14 (including the link-interaction/additional-information display step and the specific foreground/background 3D relationship) — not established on this record.

Bottom line on § 102: On the authoritative post-grant record, no cited reference was found to anticipate any claim of US 8,881,048. The five most relevant references — Robertson, Gralla, Gettman, Sauve (Ex-1007), and Tsuda (Ex-1008) — each disclose pieces (3D thumbnail arrangements, 2D browser windows, quick-pick tab switching, 3D window stacks with foreground/background planes), and in combination they rendered claims 14–18 obvious, but claims 1–13 survived because the combination still lacked the "previously rendered webpage" restoration limitation.

6. Explicit caveats (per operating rules)

  1. I could not retrieve the complete front-page "References Cited" list of the granted US8881048B2 within the available search steps (Google Patents "Citations" tab and USPTO Patent Center full-text were not directly accessible). The references analyzed above are those confirmed as the operative prior art in IPR2023-00242 and the CAFC appeals — which is the authoritative, litigation-tested set — plus the NPL cited in the family's EP counterpart.
  2. Full bibliographic data (patent numbers, exact publication dates) for Robertson, Gralla, Gettman, Sauve, and Tsuda could not be confirmed from the retrieved snippets. I have deliberately not guessed patent numbers. To complete this table, pull the IPR2023-00242 petition (Exhibits 1004–1008) or the PTAB Final Written Decision (June 13, 2024) from PTAB's API/Docket Alarm, or the "Citations" section of https://patents.google.com/patent/US8881048/en.
  3. Date discrepancy (flagged): the governing task date is Apr. 26, 2026, but the CAFC decisions in 25-1022/25-1051/25-1082 are dated Aug. 31, 2026 per live search results. Per the operating rules, I have treated the live search results (including the 2026 CAFC affirmance) as ground truth.
  4. § 102 vs. § 103: the IPR/CAFC record establishes only § 103 obviousness for claims 14–18. My § 102 "potential anticipation" statements above are analytical assessments, not holdings, and should be labeled as such in any submission.

Recommended verification path: USPTO Patent Center (application 12/751,879) → "References Cited" tab for the exact examiner-cited list; PTAB IPR2023-00242 Final Written Decision and Petition (Exhibits 1004–1008) for full citations of Robertson, Gralla, Gettman, Sauve, and Tsuda.

Generated 9/1/2026, 4:48:43 AM

Obviousness

Combinations of prior art that suggest the claimed invention would have been obvious under 35 U.S.C. § 103.

✓ Generated

Obviousness Analysis — U.S. Patent 8,881,048 B2 (SpaceTime3D 3D GUI)

35 U.S.C. § 103 — Prior-Art Combinations and Motivation to Combine

Scope note. The task directs me to use "the results from the Prior Art section of this page." The Google Patents rendering supplied with this analysis truncates before the "References Cited" section, but live searches recovered (a) the examiner-cited references from the '048 family (parent US 7,735,018 and the '048 face), and (b) the complete prior-art record from the IPR proceedings on this patent (IPR2023-00242, IPR2023-00577). I rely on those.

Date flag (per operating rules). The task states today is April 26, 2026. Live search results include an IPWatchdog report of the Federal Circuit's decision in the '048 appeals dated August 31, 2026 — i.e., after the stated current date. Consistent with the instruction to treat live search results as ground truth where they conflict, I incorporate the CAFC outcome, but the § 103 analysis below does not depend on it: the PTAB Final Written Decisions (June 13, 2024) were already in the record as of April 2026, with the CAFC appeals (25-1022/25-1051/25-1082) pending.

1. The patent and the claims at issue

US 8,881,048 B2 ("the '048 patent," inventor E. Eddie Bakhash, filed Mar. 31, 2010, issued Nov. 4, 2014, priority Sep. 13, 2005) is directed to a GUI that renders webpages, captures images of the rendered webpages, texture-maps those images onto objects arranged at different depths (foreground/background) in a simulated 3D space, and — upon user interaction with a 3D object — replaces the 3D objects with a window in a 2D space containing the selected webpage, where a link click in that window causes additional information to be rendered and displayed in the same 2D window. (Specification: "interactive composite texture mapping," "Bind to the HUD," 2D/3D toggling; see IPWatchdog, Aug. 31, 2026.)

Claim 1 (independent) — key limitations (as reproduced in the IPR demonstratives, Ex-1061):

receiving at least first and second inputs from an end user; receiving first and second webpages from at least one server in response to said inputs (website addresses); rendering the first and second webpages; capturing images of the first and second rendered webpages; displaying the first and second images on first and second objects in a simulated 3D space, first object in a foreground, second object in a background; receiving an interaction on the first image; replacing the first and second objects within the 3D space with a window within a 2D space in response to the interaction, wherein the window includes the rendered first webpage; receiving an interaction on a link in the rendered first webpage; rendering the additional information; and displaying the rendered additional information in said 2D window.

Claim 14 (independent) tracks claim 1 but requires the 2D window to contain "the first webpage" — not "the rendered first webpage" — and (per the Board/CAFC) encompasses a page rendered anew after user interaction, not merely the previously rendered version.

Dependent claims add: re-displaying the 3D objects after closing/replacing the 2D window (claims 2, 17); toggle interactions (claim 3, 17a/17b); navigation interactions moving the second/background object to the foreground (claims 4, 18).

Claim count: 18 claims; independent claims 1, 8 (system), and 14 (per the earlier summary and the CAFC opinion).

2. The operative prior-art record

2.1 References cited by the Examiner during prosecution (family)

The '048 is a continuation of US 7,735,018; the face of the family shows the examiner considered (inter alia): US 5,319,387 (Yoshikawa); US 5,428,735 (Kahl); US 6,121,969 (Jain); US 6,499,029 (Kurapati); US 6,577,330 (Tsuda); US 6,725,427 (Freeman); US 6,768,909 (Prager); US 2001/0050687 (Iida); US 2002/0033848 (Sciammarella); US 2003/0164827 (Gottesman); US 2003/0179231 (Kamiwada); US 2004/0268451 (Robbin); plus NPL including Karam, "Visualization Using Timelines" (1994) and De Pauw, "Execution Patterns in Object-Oriented Visualization" (1998).

2.2 References asserted in the IPRs (the primary § 103 combinations)

The instituted grounds (IPR2023-00242, Apple/Google; IPR2023-00577, LG/Google; both instituted Aug. 7, 2023; FWDs June 13, 2024) were:

Ground Combination Claims
1 Robertson (US 6,414,677) + Gralla (How the Internet Works, 6th ed., Que, 2002) + Gettman (US 2005/0086612) 1–18
2 Sauve (US 2006/0230356) + Tsuda (US 6,577,330) 1–18

(Stipulation Ex-1054; ai-lab.exparte.com petition analyses for both IPRs.)

3. Legal framework applied to this record

Under pre-AIA § 103 (the statute applicable to this 2005-priority patent), a claim is unpatentable if the differences between it and the prior art are such that the subject matter as a whole would have been obvious at the time of invention to a POSITA (Graham v. John Deere factors: scope/content of prior art, differences, level of ordinary skill, secondary considerations). Post-KSR, the inquiry is expansive: a combination of known elements can be obvious if the result is predictable, if there is a design need or market pressure to solve a known problem, or if the prior art provides a "rational underpinning" for the combination — express suggestion is not required.

Level of ordinary skill (per the IPR expert declarations, Ex-1003 Fuchs / Ex-2014 Schaefer): a designer/developer with a bachelor's-level background in computer science or equivalent and roughly 2–5 years' experience in GUI design, web-browser technology, and 3D graphics — consistent with the art's interdisciplinary nature.

4. Combination No. 1 — Robertson + Gralla + Gettman

4.1 What each reference contributes

  • Robertson (US 6,414,677) — a 3D GUI that "exploits spatial memory" by arranging object thumbnails — including webpage thumbnails — on a simulated 3D landscape (the "Data Mountain" concept). Selecting a thumbnail displays the object as a "live" object loaded in its associated application — e.g., "the Internet Explorer™ Internet browser…[for] rendering a (first) web page," which can be "maximized…to substantially fill the screen" while the 3D GUI is "in the background" (13:55–14:14, Fig. 9). Thumbnails are moved about the landscape, including between foreground and background. Robertson expressly frames the invention as an improvement over hierarchical bookmark lists in conventional browsers (6:51–68: more objects at once on a single display; spatial memory).

  • Gralla (2002 textbook) — supplies the conventional-browser context Robertson targets: how Internet Explorer renders HTML pages, displays windows on a 2D desktop, and provides the "Favorites" bookmark list that Robertson criticizes. Used to establish the ordinary 2D-browser "window within a 2D space" and webpage-rendering baseline.

  • Gettman (US 2005/0086612) — a 3D "virtual city" browser: webpages are mapped to display windows on virtual buildings; Gettman describes rendering webpages, capturing "bitmap screenshots"/"cached HTML pages" stored "as textures in the client computer memory," and applying them to populate display windows (objects) in the 3D space, plus toggling between the 3D perspective view and a "normal web browser window on [a] wall" (abstract; Ex-1003 ¶¶ 114–118).

4.2 Element-by-element mapping (exemplified on claim 14 / claims 14–18)

Claim 14 element Robertson + Gralla + Gettman
first/second inputs = website addresses Robertson's browser-based revisitation of webpage URLs; Gralla's IE address bar/Favorites
receiving first/second webpages from a server Gralla (HTTP retrieval); Robertson webpages; Gettman's network-location identifiers
capturing images of (portions of) the webpages Robertson's low-resolution bitmap thumbnails ("screen snapshots of actual web pages…for texture mapping" — Data Mountain paper, Ex-1030); Gettman's "bitmap screenshots" stored as textures
displaying images on first/second objects in a simulated 3D space, first object foreground / second object background Robertson's thumbnails on a 3D landscape (Ex-1004 Fig. 8A; thumbnails moved foreground↔background); Gettman's texture-mapped display windows in the 3D city
interaction on the first image; replacing the 3D objects with a window within a 2D space including the first webpage Robertson's selection of a thumbnail opening the "live" webpage in a maximized IE 2D window; Gettman's toggle to a normal 2D browser window
interaction on a link; rendering additional information; displaying in the same 2D window Robertson's live IE browser (a conventional 2D browser renders the linked page in the same window); Gralla's description of link-following in IE

For claims 2–4/17–18 (toggle back to 3D; navigation moving background object to foreground): Robertson's 3D GUI returns when the browser is closed/minimized, and thumbnails are repositionable in the landscape (Ex-1004 6:32–40, 9:xx; Board findings, CAFC Record at 14–18).

4.3 Why a POSITA would combine them (motivation / rational underpinning)

  1. Robertson's own express roadmap. Robertson identifies the very problem that Gralla's browser represents (inefficient hierarchical bookmark lists) and proposes its 3D landscape as the solution. A POSITA improving browser page-revisitation would start from Robertson and would understand the browser context from Gralla — the combination is invited by the primary reference itself (KSR "known problem" + design need).
  2. Gettman supplies the missing implementation mechanics. Robertson discloses texture-mapped webpage thumbnails at a conceptual level; Gettman teaches precisely how to implement it — render a page, capture its bitmap, store as a texture, map it onto 3D geometry — and teaches the same 3D↔2D switching behavior. Substituting Gettman's toggle technique is the "simple substitution of one known element for another" yielding a predictable result (KSR).
  3. Both Robertson and Gettman are in the same field (3D web GUI) and both already teach the 3D→2D transition, so the combination is of known, compatible elements with no new functionality required.
  4. Market forces / design incentives. Improving browser page-revisitation and managing screen space were recognized industry goals (Robertson 6:65–68; the contemporaneous 3D-GUI literature: Information Visualizer, Document Lens, US 5,880,733, WebBook/Web Forager, Data Mountain, US 6,229,542 — all catalogued in Ex-1003 ¶¶ 150–160).
  5. Reasonable expectation of success. 3D GUIs, web browsers, and image texturing were all demonstrated, well-understood technologies by 2005; the combination is an exercise in applying known techniques to a known system.

4.4 Why this combination nevertheless did not take down claims 1–13

The Board (affirmed by the CAFC) construed "the rendered first webpage" in claim 1 to mean "the rendered version from which the corresponding image was captured" — i.e., the 2D window must restore the same previously rendered instance whose image was texture-mapped, not a freshly re-rendered page. Robertson and Gettman render the webpage in response to the user's selection (a new "live" page), and neither restores the earlier rendered version; Apple's attempt to supply the missing limitation via browser caching was rejected as a late-raised new theory/references in reply. So for claims 1–13, the combination fails on limitation [1d.ii]. That is the dispositive difference between claims 1 and 14: claim 14's "the first webpage" is not so limited, and the Board/CAFC held the window in claim 14 encompasses a page rendered anew after interaction — making the combination sufficient for claims 14–18.

5. Combination No. 2 — Sauve + Tsuda

5.1 What each reference contributes

  • Sauve (US 2006/0230356, Microsoft) — a tabbed-browser "quick pick" UI: the browser renders webpages in tabs and displays thumbnails of all open tabs in a quick-pick window so a user can distinguish tabs at a glance; selecting a thumbnail switches back to a tabbed 2D window view displaying the selected tab's webpage; thumbnails are repositionable by drag-and-drop; a button/hotkey toggles between the quick-pick view and the tabbed window (¶¶ 0002–0005, 0018, 0039, 0041–0048; cl. 3, 13).
  • Tsuda (US 6,577,330) — a display apparatus that arranges application windows in a virtual 3D space: 2D "display data" from applications is stored in memory, texture-mapped onto window objects in 3D, and projected in perspective view (e.g., a horizontal stack with foreground/background planes) so the user can "grasp the type and display content of each window at a glance" (2:xx, 10:50–62, 13:15–43, Figs. 11B–12C). Tsuda expressly notes its utility for a user "browsing various homepages on the Internet."

5.2 Element mapping (claim 14 / 14–18)

The combination replaces Sauve's 2D grid of tab thumbnails with Tsuda's 3D perspective stack: Sauve's browser renders the first/second webpages (¶ 0026–27, HTML rendering threads); Sauve's thumbnails are the captured images (cl. 3, 13 — "thumbnail displaying a screen shot of content"); Tsuda texture-maps those images onto 3D window objects with one in the foreground and one in the background (the Board expressly found the foreground/background relationship satisfied: rightmost window forward, leftward windows in background); selecting a thumbnail in the quick-pick UI switches to Sauve's tabbed 2D window displaying the selected webpage — satisfying the "window within a 2D space" and "the first webpage" elements (Petitioner's annotated Fig. 11 in the quick-pick context; FWD; CourtListener record at 16–18).

5.3 Why a POSITA would combine them

  1. Tsuda's own suggestion. Tsuda states its 3D window-arrangement technique is well-suited to browsing Internet homepages — the exact function of Sauve's tabbed browser. This is the classic case of a secondary reference pointing to the primary's field of use.
  2. Known problem, known solution. Sauve's quick-pick grid suffers screen-space limits as the number of tabs grows. The 3D-GUI literature uniformly taught that perspective 3D presentation "packs the space more densely" and displays more objects at once (Tsuda itself; Robertson 6:65–68; Information Visualizer p. 5; Document Lens p. 1; US 5,880,733 10:19–40; WebBook/Web Forager p. 6; Data Mountain p. 4; US 6,229,542 3:5–11 — all catalogued in Ex-1003 ¶¶ 150–160). Applying Tsuda's 3D stack to Sauve's quick-pick UI is a predictable improvement in space efficiency.
  3. The stack metaphor adds ordering structure. Arranging the tab thumbnails as a depth-ordered stack conveys tab order/importance better than a flat 2D array, and exploits spatial memory — a recognized advantage of 3D GUIs (Robertson 6:51–55; US 6,909,443 2:1–4).
  4. Design incentives and market forces. Both references are in the same field (web-browser UI); 3D GUIs and next-generation browser tab tools were active development areas before the critical date (Ex-1003 § VI.A).
  5. Reasonable expectation of success. The combination is a "known 3D interface solution (Tsuda) applied to a known problem in a 2D interface (Sauve's quick-pick)," where the secondary reference is in the precise field suggested by the primary — predictable, not inventive.

5.4 Why this combination also failed against claims 1–13

The same "rendered first webpage" limitation is dispositive: the Board found neither Sauve nor Tsuda teaches restoring the previously rendered webpage version from which the thumbnail was captured. Sauve's thumbnail-to-tab switch re-displays the selected tab's content, and Apple's expert failed to adequately explain why a POSITA would understand Sauve to display the same version used to create the thumbnail (FWD; CAFC opinion). So claims 1–13 again survive; claims 14–18 (which lack the "rendered" requirement) again fall.

6. Outcome on the litigated record (as reported)

  • PTAB (IPR2023-00242 FWD, June 13, 2024): Claims 1–13 not shown unpatentable; claims 14–18 obvious over both Ground 1 (Robertson–Gralla–Gettman) and Ground 2 (Sauve–Tsuda). IPR2023-00577 (LG/Google) involved the same two grounds. IPR2020-01417 (Samsung) was settled pre-institution.
  • CAFC (per IPWatchdog, Aug. 31, 2026 — after the stated current date; flagged above): In 25-1022/25-1051, the court affirmed — adopting the Board's construction of "the rendered first webpage," rejecting the late-raised browser-caching theory, and upholding the obviousness finding for claims 14–18 (including the "window within a 2D space" and foreground/background findings). In cross-appeal 25-1082, the CAFC rejected SpaceTime3D's argument that "the first webpage" in claim 14 should be construed like "the rendered first webpage" in claim 1, and affirmed invalidation of claims 14–18.

7. Additional combinations a challenger could construct from the prosecution record

If the "rendered first webpage" construction were ever revisited or narrowed in another proceeding, the strongest additional § 103 scaffolding from the cited art would be:

  • Tsuda (6,577,330) + Sciammarella (2002/0033848) — Sciammarella discloses 3D window environments with texture-mapped window images; pairing it with Tsuda's 3D perspective stack would cover the "texturing images onto 3D objects with foreground/background" limitation independently of Sauve.
  • Freeman (6,725,427) or Prager (6,768,909) + Tsuda — both address 2D-to-3D window/display transformation (Freeman: 3D display of 2D content; Prager: document retrieval/display); either could substitute for Sauve's tab-switching role in Ground 2.
  • Gettman (2005/0086612) + Tsuda — Gettman's texture-mapped 3D city browser combined with Tsuda's depth-stacking would cover the full 3D object display plus the 2D-window fallback, with Gettman's explicit "cached HTML pages stored as textures" language being the closest disclosure to the "previously rendered" concept (though the Board still found it insufficient for limitation [1d.ii] because Gettman renders on selection rather than restoring).
  • Kamiwada (2003/0179231) — cited by the examiner; discloses 3D window display with navigation; useful as a secondary reference to show the depth/foreground-background arrangement was conventional.

For claims 14–18, however, the record already establishes obviousness over the two petitioned combinations, so these additional pairings are largely academic unless claims 14–18 are amended/reissued.

8. Secondary considerations (objective indicia)

The Board's obviousness findings for claims 14–18 withstood the objective-indicia arguments SpaceTime3D raised (commercial success, long-felt need, copying were asserted in the PO Response; the Board found them insufficient to overcome the strong prima facie case on claims 14–18). No evidence in the record shows unexpected results for the claim-14 formulation, which the CAFC noted "encompasses a page rendered anew" — i.e., the ordinary browser behavior in Robertson/Sauve.

9. Bottom line

  • Claims 1–13 are the robust part of the '048 patent because of one limitation: the 2D window must contain "the rendered first webpage" — the same previously rendered version whose image was captured — which neither Robertson–Gralla–Gettman nor Sauve–Tsuda teaches. Under the Board's and CAFC's construction, no combination on this record renders claims 1–13 obvious.
  • Claims 14–18 omit the "rendered" requirement and are obvious under § 103 over Robertson + Gralla + Gettman (Ground 1) and independently over Sauve + Tsuda (Ground 2), with well-documented motivations: Robertson's own critique of conventional browser bookmarks (Gralla), Gettman's implementation-level rendering/capturing/texturing and 3D↔2D toggling, Tsuda's express statement of suitability for browsing homepages, the recognized screen-space and spatial-memory benefits of 3D presentation, and the design incentives/market forces driving 3D-GUI and browser-tab development pre-2005.

Key sources: IPWatchdog (Aug. 31, 2026) — https://ipwatchdog.com/2026/08/31/spacetime3d-mixed-results-federal-circuit-appeals-apple-google-iprs/ ; CAFC record (CourtListener 25-1022) — https://www.courtlistener.com/docket/73575988/18/apple-inc-v-spacetime3d-inc/ ; Fuchs Decl. Ex-1003 (IPR2023-00242); Institution Decision (June 16, 2023); Apple Stipulation Ex-1054 (May 24, 2023); PO Cross-Appeal Notice Ex-2001/Notice (Oct. 14, 2024); Robertson US 6,414,677; Gettman US 2005/0086612; Sauve US 2006/0230356; Tsuda US 6,577,330; petition analyses for IPR2023-00242 and IPR2023-00577 (ai-lab.exparte.com); family references from US 7,735,018.

Generated 9/1/2026, 4:48:45 AM

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