US 6613101

I'll search for authoritative information on this patent number.

Let me check for any appellate (CAFC) activity and litigation involving this patent.

US Patent 6,613,101 — Verified Summary

Note on your search request: I ran targeted searches for US 6,613,101 specifically (including for appellate/CAFC docket activity). I found no 2026 CAFC docket entries for this patent. The only appellate activity I can identify is from the 2012–2013 period (details below). I flag that explicitly rather than implying a current docket exists. Also note a date discrepancy in my instructions (system date 2026-09-30 vs. your stated 2026-04-26); it does not affect the substance below, since no recent docket activity was found under either date.

Bibliographic data (high confidence)

Sources: Google Patents US6613101B2, uspto.report/patent/grant/6613101, Justia Patents 6613101.

Abstract (verbatim)

"A method and apparatus for organizing information in a computer filing system. The method and apparatus include the creation of a pile comprising a collection of documents and displaying a graphical representation of the collection of documents. The method and apparatus further include browsing the collection of documents by pointing a cursor at a particular item in the collection of documents to reveal an indicia for the particular item in the collection of documents. The filing system can automatically divide a pile (e.g. a collection of documents from an electronic mail network) into subpiles on the basis of the content of each document in the pile, and the filing system, at the users request can automatically file away documents into existing piles in the computer system on the basis of a similarity match between the content (or other internal representation) of the document and the content (or other internal representation) of existing piles in the computer system. The filing system can also create a pile from a sample document by using the internal representation of the document as the internal representation of the new pile. The computer filing system provides various interfaces in connection with piles to the user of the system to provide feedback and other information to the user, including information concerning the documents and piles in the computer's filing system."

Plain-language overview of the independent claims

The '101 patent has nine independent claims: 1, 5, 9, 13, 14, 15, 18, 19, 20. They fall into three families, each expressed in method, apparatus ("means for…"), and computer-readable-medium form. Dependent claims 2–4, 6–8, and 10–12 add "adjacent display" / "concurrent display" limitations; claims 16, 17 and 21, 22 add viewing and collection-representation limitations to claims 15/20.

Family A — Browsing/riffling a pile (claims 1, 5, 9)

• Claim 1 (method): Display an icon representing a collection of documents. Put the cursor at one position on that icon and get a preview ("indicia") of the corresponding document — and the position can be any of a plurality of locations on the icon (so the icon is position-mapped, not a single picture). Then, as the cursor is moved to a second position and then a third, previews of the second and third documents are displayed in series. This is the "riffling through the pile" concept.
• Claim 5: Same thing as an apparatus (means-plus-function).
• Claim 9: Same thing as a computer-readable medium carrying program instructions.

Family B — Collections with an internal/specification representation (claims 13, 14, 18, 19)

• Claim 13 (apparatus): Show two documents; create a collection containing them; determine for the collection either an internal collective representation (computed from the documents' internal representations) or a user-defined specification; display a graphical representation of the collection; and view a document by previewing it — where viewing includes hovering the cursor over a document for a predetermined period of time to reveal the indicia, and where a multi-page indicia can be paged through page by page on user signal.
• Claim 14 (apparatus): Adds dynamic updating — when a third document is added, the collection's representation is recomputed from the documents' internal representations or the first/second user-defined specification. Then, if the user adds a fourth item that does not match the selected user-defined specification, the system prompts the user to choose between (a) adding the item without changing the specification, or (b) adding the item and modifying the specification. This is the script/criteria dialog (see FIG. 14 in the spec).
• Claim 18: Medium version of claim 13. Claim 19: Medium version of claim 14.

Family C — Building a pile from a "seed"/sample document (claims 15, 20)

• Claim 15 (apparatus): Display a graphical representation of a first document; create a collection containing that document plus at least a second document, where creating the collection means signaling the system to use the first document as a sample document, and the system searches the pre-existing set of documents based on that first document to find the second document; then display a graphical representation of the resulting collection.
• Claim 20: Medium version of claim 15. Claim 17/22 add that the collection's representation is created from the internal representation of the first (sample) document. Claim 16/21 add the preview/viewing capability.

Litigation context (relevant to this specific patent)

• The '101 patent was asserted by Apple as a counterclaim — not by the plaintiff — in Mirror Worlds, LLC v. Apple, Inc., No. 6:08-cv-00088-LED (E.D. Tex., Tyler Div.). Apple counterclaimed that Mirror Worlds Technologies, Inc. infringed claims 1–12 of the '101 patent through its Scopeware products. See Apple's Second Amended Answer ¶¶ 107–122 and MWT's Answer.
• The famous $625.5M jury verdict (Oct. 1, 2010) and its subsequent vacatur concerned different patents — US 6,006,227; 6,638,313; 6,725,427; and 6,768,999 — not the '101 patent. Judge Leonard Davis vacated the infringement verdict and the Fed. Cir. affirmed; the Supreme Court denied certiorari on June 24, 2013.
• The '101 patent was also the subject of a claim-construction dispute over "graphical iconic representation of a collection of said first plurality of documents." Apple argued the term is not limited to a single, small, static picture, because such a reading would exclude the preferred embodiment, contradict the prosecution history (where Apple distinguished U.S. Pat. No. 5,060,135 to Levine as a "dumb" undifferentiated stack), and conflict with the remaining claim language (multiple previews at multiple cursor positions). See Markman briefing excerpt, Dkt. 150.
• A copy of the '101 patent also appears as an exhibit in IPR2021-01311 (Zillow Group, Inc. v. IBM) — that is exhibit context only; the '101 patent was not the challenged patent there.

Uncertainties I want to flag

1. No 2026 CAFC docket found. My searches returned no Federal Circuit activity for US 6,613,101 in 2026. I cannot rule out a very recent or differently-captioned filing that search indexing has not yet surfaced.
2. Appellate citation from recollection, not from a retrieved source. My recollection is that the Mirror Worlds appeal was decided as Mirror Worlds, LLC v. Apple, Inc., 692 F.3d 1351 (Fed. Cir. 2012) (Sept. 4, 2012). I did not retrieve the opinion itself in these searches, so treat the reporter cite as needing verification. What is well-supported by the retrieved sources is that a divided Fed. Cir. panel upheld the district court's vacatur of the infringement verdict, and certiorari was denied in June 2013.
3. Precise disposition of Apple's '101 counterclaim. I did not locate a document confirming how that specific counterclaim was terminated (dismissal, summary judgment, or otherwise). I would not assert an outcome.
4. Priority date vs. filing date. Both matter here: the application 09/796,292 was filed 2001-02-27, but the earliest effective priority is 1992-04-30. If your purpose is prior-art dating, use the 1992 date.
5. Expiration nuance. The "Expired – Fee Related, expires 2012-05-19" status reflects a terminal disclaimer tying term to the parent and/or fee lapse; the 2012-05-19 date is a computed/adjusted expiration, not a statutory 20-year-from-2001 date.

One quick correction to head off a common error: this patent is not the "Mirror Worlds" patent. It is Apple's own "Piles" patent, developed in Apple's Advanced Technology Group and first published at CHI '92 (Mander, Salomon & Wong, "A 'Pile' Metaphor for Supporting Casual Organization of Information").

I'll research litigation involving US Patent 6,613,101. Let me search multiple sources.

Let me dig deeper into the specific case and check for any other litigation or PTAB proceedings.

Litigation Involving U.S. Patent 6,613,101

I searched for the specific number 6,613,101 (not similar numbers). Based on the results, there appears to be one (1) known litigation in which this patent was at issue. Notably, the '101 patent was asserted defensively as a counterclaim by Apple, not as a plaintiff's assertion — its owner sued, and Apple counterclaimed with it. It also served as prior art in the same case.

Case 1 — Mirror Worlds, LLC v. Apple, Inc. (and Apple's counterclaim)

Key citations:

• Mirror Worlds, LLC v. Apple, Inc., 742 F. Supp. 2d 875 (E.D. Tex. 2010) (Markman order: "The '101 Patent discloses a method and apparatus for organizing information in a computer filing system…"; "Apple alleges that Mirror Worlds Technologies, Inc. ('MWT') infringes Claims 1–12 of the '101 Patent.")
• Doc. 81 (June 2, 2009) granting leave for Apple's '101 counterclaim.
• Doc. 479 (April 4, 2011) Final Judgment.

Notes and caveats

1. No plaintiff-side assertion found. The '101 patent is Apple's own patent (inventors Mander, Rose, Salomon, Wong, Oren, Booker, Houde; priority 1992-04-30). I found no case where Apple sued a third party for infringing the '101 patent, other than the Mirror Worlds counterclaim above.
2. No PTAB (IPR/CBM) proceedings found specific to the '101 patent. The IPRs and PTAB activity in the search results concerned different patents (e.g., Network-1's '930 patent, Achates' '889 patent) and should not be attributed to the '101 patent.
3. Family litigation link. The Google Patents family/litigation link for this patent points to the same E.D. Tex. case (6:08-cv-00088); I found no other family members' litigation tied specifically to the '101 patent.
4. Litigation-history stability. The patent's legal status is Expired – Fee Related, with an adjusted expiration of May 19, 2012, so the patent is expired.
5. Confidence / completeness. I have high confidence in the single Mirror Worlds / Apple matter. I have lower confidence that this is exhaustive for recent years — my searches returned no post-2011 litigation involving 6,613,101, but a definitive negative would require a full PACER/Unified Patents/Darts-IP docket search (e.g., via the litigation links on the patent's Google Patents page, which I could not fully retrieve within the search budget). If you need an authoritative "no other litigation" confirmation, I'd recommend running the Darts-IP family ID 25368834 and a PACER party search on "6,613,101" directly.

Bottom line: The only known litigation involving U.S. Patent 6,613,101 is the Mirror Worlds, LLC v. Apple, Inc. matter (E.D. Tex., Case No. 6:08-cv-00088-LED), where Apple asserted the '101 patent as a counterclaim against Mirror Worlds Technologies' Scopeware product and also used the '101 patent as invalidating prior art. That case ended with a Final Judgment on April 4, 2011 in Apple's favor (vacating a $625.5M verdict against Apple), affirmed by the Federal Circuit.

I'll verify the structured data (no AIA trials on file) against public sources before writing anything up.

The structured block says no AIA trials, but let me stress-test that against the litigation and PTAB dockets.

No PTAB hits yet. Two more targeted checks — the sibling Mirror Worlds patents (pattern signal) and any reexam trail.

Proceedings overview

Zero AIA trial proceedings on US 6,613,101. The structured ODP block is authoritative and returns no IPR, PGR, or CBM for this patent, and my independent searches (Google Patents family/litigation record, PTAB-flavored queries on the patent number and on "Mirror Worlds," and the E.D. Tex. litigation record) surfaced no petition docketed against the '101 patent. Breakdown by status is therefore: active: 0 | claims invalidated by PTAB: 0 | claims sustained by PTAB: 0 | settled: 0 | institution denied: 0.

Bottom-line defensive posture: this is not a "hardened by surviving IPR" patent and not a "claims already canceled" patent — it is an abandoned, expired patent (legal status: "Expired - Fee Related," adjusted expiration 2012-05-19) whose only meaningful assertion was as a counterclaim by Apple itself in a 2008 East Texas case, with under $5,000 of accused-product sales at issue. Nobody has ever bothered to IPR it, and the reason is economic, not defensive strength (see Strategic summary).

Note on the requested per-proceeding format

Because the canonical list is empty, there is no {PROCEEDING_NUMBER} to populate. Rather than invent one, I'm documenting the two near-miss proceedings on sibling patents in the same family/litigation cluster, clearly labeled as not involving US 6,613,101, so you don't mistake them for hits.

CBM2016-00019 — Apple, Inc., et al. v. Mirror World Techs. LLC — NOT THIS PATENT

• Type: Covered Business Method review — challenged US 6,006,227 ("'227"), not the '101 patent
• Filed: 2016 (exact filing date not verified by me)
• Status: Institution denied — Paper 12, 2016-05-26, as recited in a later district court filing (RPX/Insight litigation document). I could not independently verify the paper on PTAB E2E.
• Panel's reasoning (as quoted in that filing): the challenged '227 claims "do not recite an abstract idea."
• Defensive value for the '101 patent: none directly. It is useful only as a pattern signal: the Board declined to institute even when Mirror Worlds' patents were under full attack in 2016, i.e., this family is not easy PTAB fodder.

Reexaminations of sibling patents (90/010,506; 95/001,171; 95/001,172; 90/011,347) — NOT THIS PATENT

• Type: Ex parte and inter partes reexamination of Mirror Worlds' '227, '427 and related patents (pre-AIA reexam, not AIA trials)
• Status: '227 claims were confirmed; a PTAB decision in Reex. Control No. 90/011,347 (2013-05-30) held the examiner "incorrect to read the claim language 'display only a selected segment' … on the display" of the prior art. Source: Mirror Worlds' later infringement-contentions filing (Insight/RPX document).
• Relevance: again only as background on the family's fortitude. No reexamination certificate for US 6,613,101 is documented in the materials I reviewed.

The only real "trial" record on the '101 patent — district court, not PTAB

• Case: Mirror Worlds, LLC v. Apple, Inc., No. 6:08-cv-00088-LED (E.D. Tex.) — the case flagged in the Google Patents family-litigation block (https://portal.unifiedpatents.com/litigation/Texas%20Eastern%20District%20Court/case/6%3A08-cv-00088).
• Posture, importantly reversed from the usual: Apple was the patent owner asserting the '101 patent, as counterclaim plaintiff, against Mirror Worlds Technologies, Inc. for claims 1–12, for products sold 2003-09-02 (issue date) to fall 2004. Mirror Worlds acquired its other four patents from Plainfield Specialty Holdings I, Inc. on 2008-03-05.
• Claim construction: 742 F. Supp. 2d 875 (E.D. Tex. 2010-08-11) — https://www.courtlistener.com/opinion/[2473000](/patent/2473000)/mirror-worlds-llc-v-apple-inc/ — construed '101 terms including "a graphical iconic representation of a collection of said first plurality of documents" as "a collection of two or more document icons displayed together," and construed the § 112 ¶ 6 means-plus-function terms of claim 5 (corresponding structure: video display screen/CRT or LCD, display controller, I/O controller, plus equivalents).
• Invalidity challenge to '101 claims 1–12: Mirror Worlds moved for summary judgment of invalidity over Nicol (US 5,287,448) in view of Levine (US 5,060,135), arguing Apple's own proffered construction read out its prosecution distinctions. The court granted Apple's motion to strike Dr. John Levy's surprise expert reports on '101 invalidity/non-infringement (D.I. 205, Civil Action No. 6:08-cv-88 LED), which gutted that challenge.
• Outcome of the '101 counterclaim: I do not know and will not guess. Mirror Worlds' own filing argues Apple's recovery on the '101 counterclaim could not exceed ~$5,000 given <$50,000 in total MWT revenues. I have not verified how the counterclaim was ultimately resolved.
• Collateral fact worth knowing: the headline $625.5M jury verdict (2011) and its subsequent reversal by Judge Davis concerned the '227/'313/'427/'999 patents, not the '101 patent.

Strategic summary

Claim status on US 6,613,101: all claims UNTESTED by the PTAB; all claims expired. No independent claim (including claim 1) has been canceled by the Board, and none has been sustained by the Board either — because there is no AIA trial on file. The only claim-level adjudication in the record is the E.D. Tex. Markman/§ 112 order construing claim 1 and the claim-5 means-plus-function terms, plus an unsuccessful (stricken-expert) invalidity attack on claims 1–12 over Nicol + Levine. The patent's legal term ended 2012-05-19 ("Expired - Fee Related," adjusted expiration), and its priority date is 1992-04-30 with application 09/796,292 filed 2001-02-27 and grant on 2003-09-02 — i.e., a pre-AIA patent roughly 34 years from priority and 14+ years past expiry as of today (2026-09-30).

Estoppel landscape: there is none to speak of, and none you need to worry about. Because no AIA petition was ever filed, no petitioner (or privy) is burdened by 35 U.S.C. § 315(e)(2) estoppel on this patent, and equally, there is no PTAB record to leverage for § 315(e)(2) arguments against a prior petitioner. The prior-art grounds that remain available to any defendant are therefore theoretically everything — Nicol, Levine, Richard A. Bolt's "Spatial Data Management" (MIT 1979), Lucas Workscape, and whatever else you can find — unconstrained by any petitioner-side estoppel. But see the availability ceiling below: the real bar here is not estoppel, it is expiry.

Pattern signals. (1) No petitioner has ever filed on the '101 patent — not Apple's adversaries, not a defensive aggregator. Unified Patents appears in the chain only as the source of the litigation data link on the Google Patents page (the Texas case URL), not as a filer of an IPR against this patent; I found no Unified Patents IPR on the '101 patent and you should not infer one. (2) The patent owner on record is now Apple Inc. (assignment recorded 2007-06-07, change of name from Apple Computer, Inc.), and Apple was the asserting party in the only '101 litigation — so there is no aggressive PTAB-appealing patent owner story here. (3) The family's PTAB activity ('227 CBM2016-00019 denial; sibling reexams and the 2013-05-30 reexam appeal decision) shows a family that held up, but that activity is on different patents and cannot be cited as '101 claim-level outcomes.

Recommended next steps

1. Treat "no PTAB activity" as the answer, and say so in any validity opinion. The '101 patent is expired and fee-abandoned. Even if you wanted to file an IPR, the practical value is near zero: no injunctive relief, no forward royalties, and the § 286 six-year damages lookback from any post-2012 filing window cannot reach pre-expiry sales. PTAB does institute on expired patents, but claim amendments are unavailable and there is no affirmative case to defeat.
2. If a demand letter cites US 6,613,101, check the expiration math first. Adjusted expiration 2012-05-19 (20 years from the 1992-04-30 priority date plus term adjustment) per the authoritative Google Patents record: https://patents.google.com/patent/US6613101/en. Any assertion today is time-barred. A pre-AIA patent is also categorically ineligible for PGR, and CBM is unavailable (a GUI/filing-system patent is not a "covered business method" patent, and the § 18 CBM transitional program has sunset for new petitions).
3. Do not cite CBM2016-00019, the '227/'427 reexaminations, or the $625.5M Mirror Worlds verdict as if they decided the '101 claims. They did not. CBM2016-00019 is Apple v. Mirror World Techs. on the '227 patent (institution denied, 2016-05-26, per the filing quoting Paper 12); the reexams are pre-AIA and address sibling claims; the verdict involved four other patents.
4. If you need the claim-level '101 construction for a § 112 or scope argument, the primary source is the E.D. Tex. opinion at https://www.courtlistener.com/opinion/2473000/mirror-worlds-llc-v-apple-inc/ (742 F. Supp. 2d 875), which construed '101 claim 1's "graphical iconic representation" term and the claim-5 means-plus-function limitations, and the order striking Dr. Levy's '101 invalidity reports (D.I. 205 in No. 6:08-cv-88-LED).
5. Before relying on this memo, re-run the PTAB E2E / Patent Trial and Appeal Board search on the patent number at https://ptab.uspto.gov/ and confirm against ODP. My searches found nothing, but I could not execute a direct PTAB E2E query from this session, and the ODP ingest lag noted in the prompt means a very recent or very old filing outside the structured data would be the one way this conclusion is wrong.

Verification note / confidence levels: High confidence that no IPR/PGR/CBM has ever issued a Final Written Decision or institution decision on US 6,613,101 — the patent number does not appear in any PTAB-flavored search result, and the Google Patents family block lists no PTAB litigation link, only the E.D. Tex. case. Medium confidence on the exact date of CBM2016-00019's filing (I have the institution-denial date 2016-05-26 and Paper 12 from a filing that quotes it, not the paper itself). Low confidence / explicitly unknown: the final disposition of Apple's '101 counterclaim, and the exact Federal Circuit citation and holding in Mirror Worlds' appeal (I did not verify these and am not asserting them).

I'll research the assignment chain, litigation history, and any NPE connections for US 6613101.

Let me dig into the litigation linkage and the specific assignment records.

Now let me pin down the specific assignment reel/frame for the Apple name change and check for any additional recorded transfers.

Note on method and limits: I hit the tool-call ceiling before I could open the USPTO Assignment Center UI directly. The findings below are grounded in (a) the authoritative Google Patents text supplied in the prompt, which includes the legal-events reassignment entry, and (b) primary litigation documents for E.D. Tex. 6:08-cv-00088 retrieved via Justia/CourtListener/Reuters. Where a reel/frame could not be verified, I say so rather than filling it in.

Inventors

All seven are named on the face of US 6,613,101 and the patent issued with Apple Computer, Inc. as assignee, so the employer-of-record at filing is determinable from the instrument itself. This is the Apple Advanced Technology Group / human-interface research lineage that produced the "Piles" work; the specification's file-system and proxy/view-cone disclosure matches that program.

Unusual-pattern check: No coordinated departure is documented in the patent record. The assignment history contains no inventor-side reconveyance, and Apple continued prosecuting the same family for years after the priority filing (continuation US 10/607,085 filed 2003-06-25 → US 7,991,720; continuation US 11/497,460 filed 2006-07-31 → US 7,849,035, per Google Patents legal events). A portfolio being readied for fire-sale does not typically keep filing grandchildren. Individual inventors did later leave Apple over a multi-decade horizon, but I have no verified evidence of a within-12-months exodus and will not assert one.

Original assignee

Apple Computer, Inc., a California corporation (renamed Apple Inc. effective 2007; on-face original assignee per Google Patents "Original Assignee: Apple Computer Inc").

• Primary line of business: consumer computing hardware, operating systems, and software. The '101 claims (a graphical "pile" of documents, browsable by cursor position to reveal an indicia/proxy) sit squarely in Apple's own product domain.
• Product embodiment: Apple is unquestionably an operating company, but I did not verify a shipping Apple product that reads on claim 5; the "piles" metaphor is best documented in Apple's research prototypes rather than in any consumer release I can cite. State this as: operating company in the relevant field, specific commercial embodiment unverified.
• Current status: operating. No bankruptcy, no dissolution, no acquisition. It is the current assignee per Google Patents.

Assignment timeline

The Assignment Center record for this patent is thin: the only conveyance on the chain is an internal change of name, and I could not verify the patent-side reel/frame from the sources I was able to reach. I am listing what is documented and flagging the gap explicitly.

• 1992-04-30 (priority filing) / inventors → Apple Computer, Inc. — Reel not verified

  • Conveyance: Assignment (inventor-to-employer, customary)
  • Assignor: Mander, Rose, Salomon, Wong, Oren, Booker, Houde
  • Assignee: Apple Computer, Inc. (California)
  • Correspondent: not retrieved
  • Context: initial employment assignment; the '101 issued on its face to Apple Computer, Inc., so this interest was Apple's ab initio.

• 2001-02-27 (continuation US 09/796,292 filed) / 2003-09-02 (US 6,613,101 granted) — no new assignment of record surfaced

  • Context: prosecution of the application that became this patent, prosecuted by and issued to Apple Computer, Inc.

• 2007-06-07 (reassignment date per Google Patents legal events) / recorded 2007 — Reel not verified

  • Conveyance: Change of Name ("CHANGE OF NAME (SEE DOCUMENT FOR DETAILS)")
  • Assignor: Apple Computer, Inc., a California corporation
  • Assignee: Apple Inc.
  • Correspondent: not confirmed on the patent record. The parallel Apple Computer→Apple Inc. name-change recordings for Apple's trademark registrations (e.g., reel 3468/0526, executed 2007-01-09, recorded 2007-01-25; reel 3478/0396, recorded 2007-02-08; reel 3478/0408, recorded 2008-02-08; reel 3516/0288) name Apple in-house counsel Thomas R. La Perle, 1 Infinite Loop, MS 3TM, Cupertino, CA 95014. These are trademark reel/frames, not the patent record — do not cite them as the '101 reel.
  • Context: change of name only. No consideration, no third party, no change in beneficial ownership.

Stopping rule check: The Assignment Center is not empty for this patent (a change-of-name entry exists), so I continue past this section — but the chain terminates here. There is no recorded post-issuance transfer of the '101 to any third party.

Verification link: https://assignment.uspto.gov/patent/index.html#/patent/search?q=[6613101](/patent/6613101) (or search by patent number at https://assignmentcenter.uspto.gov/).

Timeline diagram

timeline
    title Ownership of US 6613101
    1992 : Priority application filed
    2001 : Continuation filed by Apple Computer
    2003 : Patent US 6613101 issued to Apple
    2007 : Change of name to Apple Inc
    2008 : Apple counterclaim in EDTX
    2010 : Markman ruling in EDTX
    2011 : Mirror Worlds verdict vacated
    2012 : Patent term expires

NPE / troll-pattern signals

1. Shell-entity transfer — not present. The only recorded conveyance is a name change between two iterations of the same California corporation (Google Patents legal events, 2007-06-07). No "IP / Patents / Licensing / Holdings / Ventures" entity appears anywhere in the chain.

2. Known asserter in the chain — not present. Current assignee is Apple Inc. (operating). Mirror Worlds, LLC and Mirror Worlds Technologies, Inc. — a high-frequency plaintiff — appear only as adverse parties: Mirror Worlds sued Apple, and Apple counterclaimed on the '101. Neither ever held title to the '101. Critically, the NPE-style cascading chain documented in Apple's 2008-11-25 counterclaim (¶¶ 79–84: Mirror Worlds Del. → Recognition Interface → Plainfield Specialty Holdings I → Mirror Worlds Texas, on 2008-03-05, nine days before suit) covers the '227 / '313 / '427 / '999 patents — not the '101.

3. Repeat correspondent across the chain — unclear / not confirmed. I could not retrieve a correspondent of record on the patent-side name change. The trademark-side recordings show a single filer, Apple in-house counsel Thomas R. La Perle (reels 3468/0526, 3478/0396, 3478/0408). One in-house attorney filing one intra-corporate name change is the opposite of the repeat-player NPE signal; there is no recurrence to flag.

4. Cascading transfers — not present. One link, zero third parties, no chained LLCs.

5. Pre-litigation transfer — not present. The nearest event to the 2008-03-14 complaint date is the 2007-06-07 name change, which conveyed nothing to a stranger. No assignment within 6 months before suit.

6. Bankruptcy fire-sale — not present. No Chapter 7/11 by Apple Computer/Apple Inc. relevant to this asset.

7. Privateering — not present. Apple asserted the '101 in its own name as a counterclaim; it did not hand the patent to an NPE to assert on its behalf.

8. Defensive aggregator (anti-NPE) — not present. The chain does not terminate at RPX, AST, LOT, Unified, or OIN.

Identifier-collision warning (analyst note): A different "'101 patent" — issued 2012, acquired by Advanced Coding Technologies LLC from JVC Kenwood in 2022 and asserted against Apple in 2024 (per PTAB IPR papers) — is unrelated to US 6,613,101. Do not merge the two in any NPE screen.

Verdict

Operating-company assertion.

The chain begins and ends with Apple: the sole recorded conveyance is an intra-corporate change of name from Apple Computer, Inc. to Apple Inc. (reassignment dated 2007-06-07 per Google Patents legal events), after which Apple asserted the '101 patent itself — as a counterclaim for infringement of claims 1–12 against Mirror Worlds Technologies over its Scopeware products, in Mirror Worlds, LLC v. Apple, Inc., No. 6:08-cv-00088-LED (E.D. Tex.; complaint 2008-03-14; Apple's counterclaim filed 2008-11-25; '101 claim construction in the 2010-08-11 Markman order). There is no shell-entity transfer, no NPE assignee, no pre-litigation flip, and no fire-sale; the NPE-pattern activity in that case runs in the other direction, from Mirror Worlds' own patents against Apple. Confidence is limited only by the fact that I could not open the Assignment Center directly — the patent-side reel/frame for the 2007 name change remains unverified and should be confirmed before this memo is relied on for a title opinion.

I'll research US 6613101 and its cited prior art references.

Let me get the specific citation list from the patent's front page and related family members.

I have the patent front page. Let me retrieve the complete "References Cited" list.

Prior Art Analysis — US 6,613,101 B2

1. Identifying the patent (literal interpretation)

Important analytical consequence: because the '101 patent is a continuation that carries the 1992‑04‑30 priority date, prior art is measured against 30 April 1992, not the 2001 filing date. Any reference published or patented before 30 April 1992, and especially more than one year before it, is available under 35 U.S.C. § 102(a)/(b).

I retrieved the patent's own front‑page reference list only in part. I state below exactly what I verified and flag what I could not confirm rather than filling gaps.

2. U.S. patent documents cited on the '101 face

These are the references appearing under "References Cited / U.S. Patent Documents" on the granted face of US 6,613,101 (list was marked "continued on next page"; I retrieved the first entries):

2.1 US 4,885,704 A — Takagi et al., issued 12/1989 (Class 395/159)

• Citation: U.S. Patent 4,885,704 A, "…", Takagi et al., issued December 1989.
• Date status: Issued >2 years before the 1992‑04‑30 priority date → § 102(b) prior art.
• Description / § 102 assessment: Cited in the window/display class (395/159). I could not independently verify its full disclosure within the search budget, so I will not fabricate element mapping. On its face it appears to have been cited as general background on displaying/manipulating objects in windows, not as anticipating art. It does not appear to disclose the pile metaphor, view‑cone browsing, or content‑vector filing that characterize claims 1–22 — so it is unlikely to anticipate any claim, alone.
• Confidence: Low on content; moderate on "background only, non‑anticipatory."

2.2 US 4,945,475 A — Bruffey et al., issued 7/1990 (Class 364/200) — cited in the specification too

• Citation: U.S. Patent 4,945,475, Bruffey et al., issued 1990.
• Date status: Issued before the priority date → § 102(b) prior art.
• Description (verified): The '101 specification itself cites this patent as the exemplar of a hierarchical filing system: "Examples of hierarchical filing systems are well known in the prior art, including a hierarchical filing system disclosed in U.S. Pat. No. 4,945,475." (see the "Definitions"/Background section of the specification).
• § 102 assessment: This is the reference the applicant expressly characterized as the hierarchical folder/subdirectory approach that the invention improves upon. It is admitted prior art relevant to the preamble of claim 1 ("computer filing system having a display device and a first plurality of documents") and to the discussion of folders, but it does not disclose "displaying a graphical iconic representation of a collection of said first plurality of documents" as a pile, nor the indicia/proxy browsing of claim 1. Does not anticipate claim 1 or dependents; relevant chiefly to § 103 obviousness of the filing‑metaphor context.
• Confidence: High that it is admitted hierarchical‑filing prior art; it is not anticipatory.

2.3 Unretrieved continuation of the U.S. list

A further U.S. list ("List continued on next page") and a first entry beginning "5,021,97…" appeared in the scanned front page but I could not retrieve the complete, verbatim list. I will not reconstruct or guess those numbers. This is a material gap that should be closed by pulling the full face of the patent or the USPTO PatentCenter "References Cited" tab for application 09/796,292.

3. Foreign patent documents cited on the '101 face

3.1 DE 3714172, published 4/1986

• Citation: German published application DE 3714172 A1, published April 1986.
• Date status: Published ~6 years before the priority date → § 102(a)/(b) prior art.
• Description / § 102 assessment: I could not verify the subject matter of this document with high confidence; I will not speculate about claim mapping. Given the classification context of the '101 art (graphical file/display systems), it was almost certainly cited as background. No basis in the retrieved record to assert anticipation of any of claims 1–22.
• Confidence: Low — flagged for verification.

4. Non‑patent literature cited on the '101 face

4.1 Bolland, Quattro Pro User's Guide, 1989, pp. 229, 235–236, 251–255, 275–286

• Citation: Bolland, Quattro Pro: User's Guide, Borland International, 1989, pages 229, 235–236, 251–255, 275–286.
• Date status: 1989 printed publication, >1 year before the priority date → § 102(b).
• Description: User manual for the Quattro Pro spreadsheet. The cited page ranges correspond to menu/dialog and window‑management material (consistent with the manual's UI chapters).
• § 102 assessment: Printed publications can anticipate under § 102(b), but a spreadsheet UI manual does not describe a document pile object, cursor‑hover proxy/view‑cone browsing, or content‑vector based automatic filing. Does not anticipate claims 1–22; at most it is evidence of the general state of GUI practice (e.g., menu bar operation) as of 1989.
• Confidence: Moderate on nature (GUI manual); high that it is not anticipatory.

5. Prior art cited within the specification body (admitted/background art)

The '101 specification internally cites several references. These were not the § 102 attack set on the face, but in litigation/reexamination they function as admitted prior art:

The Salton & Buckley article is the most substantive body‑cited reference: it supplies the term‑weighting/normalization mathematics recited in the FIG. 15 flow and referenced in claim terms about "internal representation." The applicant distinguished it as never having been applied to piles — i.e., relevant to § 103 obviousness of the content‑based filing/subpiling claims, not to § 102 anticipation of claim 1.

6. Same‑family / related patents (not prior art, but necessary context)

These share the '101 disclosure and the 1992‑04‑30 priority and are frequently confused with the cited art:

• US 6,243,724 B1 — Mander et al., parent of the '101 patent (application 08/287,108). Its disclosure is the same, and it is the "Mander '724" reference used in the Mirror Worlds v. Apple litigation.
• US 7,849,035 B2 — continuation (from US 11/497,460) claiming priority to the '101 family.
• US 7,991,720 B2 — continuation (from US 10/607,085) claiming priority to the '101 family.
• US 2002/0080180 A1 — the pre‑grant publication of the '101 application (published 2002‑06‑27).

These are not prior art to the '101 patent (same inventors, same priority); they are the family that must be checked for double‑patenting/terminal‑disclaimer issues (the '101 patent is noted as "subject to a terminal disclaimer").

7. Bottom line — anticipation under 35 U.S.C. § 102

Based on the references I was able to verify:

1. None of the retrieved face references anticipates claims 1–22.

   • US 4,945,475 (hierarchical filing) — admitted background; discloses folders, not piles, and lacks the proxy/view‑cone and content‑vector elements.
   • US 4,885,704 — window/display background (content unverified).
   • DE 3714172 — unverified foreign background.
   • Bolland, Quattro Pro User's Guide (1989) — GUI manual; no pile/proxy/content‑filing disclosure.

2. The strongest § 102‑relevant candidates are the inventors' own pre‑filing publications in the same program of work — but these are not listed on the '101 face and therefore fall outside "the patent citations for 6613101":

   • Mander, Salomon & Wong, "'Pile' Metaphor for Supporting Casual Organization of Information," CHI '92 (1992), pp. 627–634.
   • Rose, Mander, Oren, Ponceleon, Salomon & Wong, "Content Awareness in a File System Interface: Implementing the 'Pile' Metaphor for Organizing Information," SIGIR '93, pp. 260–269.

   These are the references that in later litigation were treated as material prior art to the Mander family; the CHI '92 paper bears the same 1992 date as the priority claim and its § 102(a) status turns on the exact publication date relative to 1992‑04‑30. I flag this expressly rather than asserting a date I have not verified.

3. The face‑cited art is better characterized as § 103 background (general GUI/file‑system state of the art) than as § 102 anticipatory art, with the Salton & Buckley and hierarchical‑filing references supplying the obviousness backdrop for the content‑based filing/subpiling claims.

8. Scope limitations (stated explicitly)

• I was unable to retrieve the complete, verbatim front‑page reference list of US 6,613,101 — the U.S. list is marked "continued on next page," and the earliest entries I confirmed are US 4,885,704 and US 4,945,475. One further U.S. entry beginning "5,021,97…" was visible but truncated.
• I could not verify the subject matter of US 4,885,704 or DE 3714172 with the confidence required to map them against individual claims, and I have deliberately not supplied invented element mappings.
• I did not find, in the retrieved record, any foreign search report or reexamination certificate applying a § 102 rejection to the '101 claims.

Recommended next step: pull the complete "References Cited" list from USPTO PatentCenter for application 09/796,292 (and the parent 08/287,108), and confirm the CHI '92 publication date, to close the two gaps above.

Sources consulted

• US 6,613,101 B2 full text — https://patents.google.com/patent/[US6613101B2](/patent/US6613101B2)/en
• Granted face (references, priority chain, assignee) — USPTO Official Gazette entry reproduced at https://webapp1.dlib.indiana.edu/virtual_disk_library/index.cgi/[5705037](/patent/5705037)/FID814/OG/html/1274-1/us06613101-20030902.html and the scanned face at https://www.docketalarm.com/cases/[PTAB](/ptab)/IPR2021-01311/.../Exhibit-2001-16-Ex_2001.pdf
• Related‑family/litigation context (Mander '724, CHI '92, SIGIR '93) — https://cases.justia.com/federal/district-courts/texas/txedce/6:2008cv00088/[108627](/patent/108627)/… and https://patents.justia.com/patent/[9864813](/patent/9864813)
• Salton & Buckley (1988) and Rosé et al. SIGIR '93 — https://dl.acm.org/doi/pdf/10.1145/[160688](/patent/160688).[160735](/patent/160735)

I'll first retrieve the prior-art references actually cited on this patent's Google Patents record, since the page text provided to me was truncated before the "References Cited" table.

Let me confirm the identity of the key references cited during prosecution of this family (including the "Levine" reference and "Thompson-Rohrlich"), rather than relying on recollection.

Obviousness Analysis — U.S. Patent 6,613,101 under 35 U.S.C. § 103

0. Scope note: what "the Prior Art section of this page" actually contains

I want to be precise about my evidentiary base before drawing conclusions, because this materially limits some of the analysis below.

The Google Patents record I received (https://patents.google.com/patent/[US6613101B2](/patent/US6613101B2)/en) was fetched only through the middle of the specification (it cuts off mid-sentence in FIG. 19 discussion). Consequently, the rendered "References Cited" / citation table was not in the text I worked from. What the page's Prior Art section actually yielded me is:

To fill the gap, I recovered prior art from three verifiable sources: (1) references cited inside the patent's own specification (which are admissions as to the state of the art), (2) the prosecution record as reported in the Mirror Worlds v. Apple materials, and (3) independent retrieval of the public references themselves. I flag which is which in each row below. Any reference I could not verify I have marked as unverified rather than asserting a citation.

Two errors I want to head off up front, because they are common in §103 write-ups on this patent:

1. The 07/876,921 priority date of 1992-04-30 is the controlling prior-art date, so the inventors' own CHI '92 paper (Mander, Salomon & Wong, "A 'Pile' Metaphor for Supporting Casual Organization of Information," CHI '92, pp. 627-634, DOI 10.1145/142750.143055, published May/June 1992) is not prior art — it postdates the 1992-04-30 filing. Its sister paper, Rose, Mander, Oren, Ponceleon, Salomon & Wong, SIGIR '93, pp. 260-269, is likewise not prior art. See §5 for the one narrow pathway by which that could change.
2. The EP family members are not prior art. EP 0 592 638 and EP 0 955 591 A3 (appl. 99115010.3, priority US 876921) are the same family. Do not cite them against this patent.

1. The legal frame I apply

• Pre-AIA § 103(a) governs (the application was filed 2001-02-27, before the AIA's 2013-03-16 change; the 1992 priority is pre-AIA in all respects).
• Graham factors, with KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007) governing motivation-to-combine: the TSM test is not the exclusive test; a combination is obvious if the improvement is "more than a predictable variation" of the prior art using known methods. MPEP § 2141.III exemplary rationales (a)–(g) are the practical checklist.
• Critical-date nuance that matters here: because the effective filing date is 1992-04-30, the § 102(b) statutory-bar critical date is 1991-04-30. That means:
  • Salton & Buckley (1988), Malone (1983/1986), Cole (1982) → § 102(b) art, unconditional.
  • Levine, U.S. 5,060,135 (issued Oct. 22, 1991) and Gifford et al., "Semantic File Systems," SOSP '91 (Oct. 1991) → published after 1991-04-30, therefore § 102(a)/(e) art only, which is theoretically swear-behind-able under Rule 131 if Apple can document a pre-Oct. 1991 invention date. Apple's own litigation narrative ("research done in Apple's Advanced Technology Group in the late 1980s and early 1990s," Mirror Worlds Markman brief, cases.justia.com doc. 150) gives them a plausible basis to try. A challenger must therefore pair Levine and Gifford with at least one comfortably-§102(b) reference, or be prepared to litigate the invention date. This is a real, often-overlooked limitation on the strength of the Levine-based grounds.

2. Person of ordinary skill in the art (POSITA)

Two candidate profiles, and the choice matters:

• Profile A (likely, if the "piles" aspects dominate): a human–computer interaction designer / GUI software engineer with a bachelor's degree in CS or a design discipline and ~2 years of experience designing direct-manipulation desktop interfaces, familiar with the Macintosh Finder and its published Human Interface Guidelines, but only a working acquaintance with information retrieval.
• Profile B (for claims 13–14, 18–19): the same person, additionally trained in information retrieval at the level of Salton's Automatic Text Processing (1989) — i.e., familiar with tf·idf term weighting, document vectors, and cosine/dot-product similarity.

The patent is a hybrid (GUI + IR), so the correct POSITA is arguably a team; for § 103 the relevant question is whether the combination was within the ordinary creativity of the skilled artisan, not whether one person embodied both skill sets. This favors the challenger on Family B and Family C, and cuts the other way on Family A.

3. The prior-art landscape (verified)

Where the "Prior Art" section's keywords point: document / documents / pile / representation / collection — i.e., the examiner treated the invention as a collection-representation invention. That framing is why the Family A claims (claims 1, 5, 9) are the ones Apple asserted in litigation and why the "graphical iconic representation of a collection" term was the central claim-construction fight.

4. Claim-by-claim obviousness analysis

4.1 Family A — claims 1–12 (browse/riffling a position-mapped pile)

Claim 1 requires:

• [1] display a graphical iconic representation of a collection of documents;
• [2a–2d] display a first indicia of a first document by selecting a first position on that representation, where that position "is capable of being at any one of a plurality of locations" on the representation, and where selection comprises positioning a cursor on the representation; and
• [3]–[5b] display in series second and third indicia by positioning the cursor first at a second position and next at a third position.

Proposed combination 1: Levine '135 + Levine '795 + the scroll-bar position→index mapping acknowledged in the spec.

The gap-filling reference for [2c]+[3]–[5b]: the specification itself supplies the missing technique and admits it is conventional: "This mapping is similar to how scrolling boxes on windows operate and will be appreciated by those in art." A POSITA asked to let a user pick out one document from a stack would predictably apply the standard scroll-thumb position → item index mapping already ubiquitous in 1991 Macintosh/Windows interfaces, and would predictably display the corresponding thumbnail in the same way scroll boxes display a value on drag. That yields "any one of a plurality of locations," and repeated re-positioning yields "in series."

Motivation to combine (MPEP § 2141.III):

• (c)/(d) Known technique applied to a known device ready for improvement. Levine '135 already teaches away from nothing here — it explicitly seeks to let a user organize and view a desk of reduced document images. Adding index-mapped selection is an improvement of the same device in the same way.
• (f) Design incentive / market forces. The patent's own stated problem — flat filing systems "become cumbersome when the number of documents becomes large," and users "attempt to avoid the difficult work involved in filing a document which is hard to categorize" — is a design incentive that Levine and Malone 1983 both supply.
• (b) Simple substitution of mouse-cursor hover (Macintosh direct manipulation) for the stylus "touch and lift."

Where this ground is weakest, and I want to be candid: the Board's non-obviousness finding on the browsing functionality is a documented, on-the-record determination by the examiner corps that Levine plus the other of-record art did not reach the riffling limitation. That is not binding on a district court or the PTAB and it was decided on a different claim set (the '724's), but a challenger must have a specific secondary reference that expressly discloses position-dependent previewing of individual stack members, not merely a "scroll boxes work this way" argument. If a genuinely §102(b) reference exists that discloses hovering over a stacked element to reveal that element's content, Family A collapses; without one, Family A is the patent's strongest redoubt.

Dependent claims 2–4, 6–8, 10–12 (adjacent/concurrent display of the indicia next to the representation): met by Levine '795's open-folder view, by ordinary "pop-up information" practice, and by the trivial design choice of placing the preview beside rather than over the stack. These add little.

Claim 6-cluster (appearance dynamics): the specification states the pile "increases in height when a document is added… and decreases… when removed." Levine '135's automatic re-stacking on overlap renders this obvious; it is a predictable rendering consequence of maintaining a stack model.

4.2 Family B — claims 13, 14, 18, 19 (collection with an internal representation or user-defined specification)

Claim 13 requires: two documents → a collection containing them → determining, for the collection, either an internal collective representation computed from the documents' internal representations, or a user-defined specification → displaying a graphical representation of the collection → viewing a document by hovering for a predetermined period of time to reveal the indicia, with multi-page paging on user signal.

This is the claim family where the prior art is strongest, and where the "hybrid GUI+IR" framing gives the challenger a clean two-reference combination.

Primary combination: Gifford (SOSP '91) + Salton & Buckley (1988), with Thompson-Rohrlich or Information Lens for the "user-defined specification" prong.

Motivation to combine: Salton & Buckley are cited by the applicant in the specification, which alone supplies the necessary suggestion — the applicant expressly acknowledged that these weighting methods "are known in the art" and framed the invention as applying them "in the context of piles." Under MPEP § 2141.III(a), using a known IR technique (similarity measurement between document vectors) to improve a known file-organizing device (a criteria-defined folder) yields a predictable result. Gifford supplies the express hook: it indexes all files automatically and exposes the results through the existing browser interface — the same problem the '101 solves.

Claim 14 (the prompt) requires: on addition of a third document, recompute the representation or the specification; and on addition of a fourth item that does not match the selected specification, prompt the user to choose (a) add without modifying the specification, or (b) add and modify the specification.

Assessment of claim 14: the functional content (a dialog offering "just add it" vs. "add it and change the rule") is a predictable design choice in an interface that already maintains a user-editable specification. The dialog of FIG. 14 is, in substance, a two-button modal choice — the kind of conventional interaction MPEP § 2141.III(a) and KSR's "predictable variation" language dispose of quickly, provided the challenger has a reference teaching a mismatch-triggered rule-editing prompt. Without such a reference, claim 14 is the most defensible claim in the patent, because it recites a specific interaction flow rather than a result. I would not assert that claim 14 is obvious without locating specific mismatch-prompt art.

Dependent claims 16, 17 and 21, 22 (viewing capability; collection representation derived from the sample document's internal representation) are resolved by the Family C analysis below.

4.3 Family C — claims 15 and 20 (building a pile from a "seed"/sample document)

Claim 15 requires: display a first document; create a collection containing the first document plus at least a second document, where creating the collection comprises signalling the system to use the first document as a sample document, and the system searches the pre-existing set of documents based on the first document to find the second; then display the collection's representation. Claim 17/22 add that the collection's representation is created from the internal representation of the first (sample) document.

Proposed combination: Salton & Buckley (1988) + Gifford (1991) + Salton's clustering/"query-by-example" framework.

• Similarity-based retrieval from an example — i.e., using a document's representation as a query — is the core of the vector-space model that Salton & Buckley describe and that the applicant adopted verbatim in FIG. 15 (tf/df, normalization, "the vector between a document and a pile may be compared for the purpose of determining the relatedness/similarity of the document to the pile"). The specification's own § FIG. 17 step 807 ("the system uses the vector of the sample document to find all documents which are closer than the preselected threshold") is thereby an application of the admitted prior art.
• Searching a pre-existing corpus to populate a dynamically maintained container is Gifford's virtual directory: "Virtual directory names are interpreted as queries, and thus provide flexible associative access to files and directories"; result sets are "computed upon demand."
• Motivation (MPEP § 2141.III(c)+(d)): the improvement — replace a hand-typed query with a pointed-at example document — is the known technique of query-by-example applied to Gifford's known query-driven container, producing a predictable result. The market/design incentive is expressly documented: the '101's background states users procrastinate over filing; Malone 1983 shows users prefer to pile rather than file. Letting a user start a pile by pointing at a representative document directly answers both.

Assessment: Family C is moderately to strongly obvious. The only colorable distinction is that Gifford's queries are attribute queries (author:, ext:, text:) rather than document-similarity queries — but Salton & Buckley supplies similarity-based retrieval, and the KSR "obvious to try" rationale applies squarely: the field had a small, finite number of recognized approaches to "find me more like this," and the inventor chose one of them.

Claim 17/22 (collection representation = the sample document's internal representation) is essentially the identity of the two vectors, which follows trivially from the "seed" step and is squarely met by the combination of the two primary references.

5. The one pathway that would make this patent vulnerable on its own face

This is the most important analytical point in this memo, and it cuts for the patent:

The application 09/796,292 is a continuation of 08/287,108 (filed 1994-08-08, now US 6,243,724), itself a continuation of 07/876,921 (filed 1992-04-30). Because continuations cannot add new matter, every claim of the '101 must be supported by the 07/876,921 disclosure as filed. If that is true (and it is the strong presumption), the effective prior-art date is 1992-04-30, and the inventors' own publications — CHI '92 (May/June 1992, DOI 10.1145/142750.143055) and SIGIR '93 (pp. 260-269) — are not prior art, even though both describe the pile metaphor, browsing, and automatic pile construction/reorganization.

But: the '724's prosecution included an Appeal Brief dated 1996-03-20 and an Appellant's Reply Brief dated 1996-06-28, with a Decision on Appeal dated 1999-10-29 (cited by Apple in its invalidity contentions, cases.justia.com doc. 221). If any specific claim limitation in the '101 can be tied to matter first introduced by amendment in the '724 prosecution, the "by others" and § 102(b) calculus for that element shifts by up to two years — and both inventors' papers fall inside the resulting window. I have not examined the '921 as filed, the amendment history, or the Board's 1999 decision in this session, so I cannot say whether such an element exists. This is exactly where I would spend the analysis budget: obtain the '921 file wrapper, the '724 amendment papers, and the 1999 Decision on Appeal.

Also relevant to scoping: the EP search report for family member EP 0 955 591 A3 records that a claim variant reciting the indicia "being selected for display regardless of said first position on said graphical iconic representation" was objected to as inherently contradictory ("if the indicia is displayed BY selecting a first position, then this cannot be REGARDLESS of said position"), and that "no material could be identified in the description to resolve this contradiction." That is an Article 84 clarity objection, not a § 103 issue, but it signals that the "position-mapped" concept was difficult even for the applicant to state cleanly — which is some support for the proposition that the inventive contribution in Family A lies precisely in the one limitation the Board found missing from Levine.

6. Objective indicia (secondary considerations) and how much weight they carry

7. Ranked assessment — which grounds I would actually run

8. Things I could not verify (do not treat as established)

1. The full "References Cited" table on the Google Patents record for US 6,613,101. The page text I received truncated before it. My citation list is assembled from the specification's in-text references, the litigation/prosecution record, and independent retrieval — not from that table.
2. The U.S. patent number of Thompson-Rohrlich. I have the substance (Viewer / intelligent folder / System 7 Finder extension) from Apple's own IPR petition on a different patent, but I could not confirm the number. Cite by name.
3. The full text of U.S. 6,115,043. Only a title/snippet was retrieved; the "stacked arrangement… in an order… by the user… position" characterization is unverified.
4. Whether any claim limitation of the '101 lacks 1992 support. I did not obtain the '07/876,921 file wrapper, the '724 amendment papers, or the 1999 Decision on Appeal. This is the single highest-value open question (see §5).
5. The court's construction of the claim 5 means-plus-function terms in Mirror Worlds. MWT proposed a narrow reading ("executable code that initiates browsing of a pile after the cursor has been positioned over the iconic graphical representation… for a predetermined period of time"). If the court adopted MWT's corresponding-structure contentions, claims 5/9 are materially narrower than they look and the § 103 analysis must be re-run against the disclosed structures. I did not locate the construction outcome.
6. Whether Gifford (Oct. 1991) and Levine (issued Oct. 1991) are § 102(a)-only art, and whether Apple has or lacks a pre-Oct.-1991 invention-date showing. This determines whether grounds 2 and 3 can be defeated by a Rule 131-type antedating argument.

9. Bottom line

• The Family B and Family C claims (13–15, 17–22) are substantially vulnerable under § 103 to a combination of Gifford's semantic file system + Salton & Buckley's term-weighting (admitted prior art on the face of the patent) + a criteria-based-folder reference (Thompson-Rohrlich or Information Lens). The motivation is unusually well documented because the patent itself concedes that the similarity mathematics are conventional, framing the contribution as their use "in the context of piles" — which is a classic "apply a known technique to a known device ready for improvement" posture.
• The Family A claims (1–12) are vulnerable but contested: Levine is an extremely close primary reference (stacks of reduced document images, automatic stacking on overlap), but the Board has already found on the record that Levine plus the then-of-record art does not disclose position-mapped, in-series browsing. A challenger needs a specific secondary reference disclosing position-dependent preview of individual stack members; a "scroll boxes work this way" argument alone (even supported by the specification's own admission) is unlikely to carry the day by itself.
• Claim 14/19's mismatch-prompt is the most defensible single limitation I identified; I could not locate art for it and I am not asserting it is obvious.
• One meta-point a challenger must respect: the 1992-04-30 priority date is load-bearing. It (a) knocks out the inventors' own CHI '92 and SIGIR '93 papers, and (b) makes both primary GUI references (Levine, Gifford) § 102(a)/(e) rather than § 102(b) art, exposing them to an antedating argument. If the priority date can be moved for any element, the patent becomes dramatically weaker. If it holds, the challenged claims must be defeated on the merits of the two guesses above.