US 8209152B2

Summary of US Patent 8209152B2

Bibliographic data

Abstract (verbatim)

"User interface systems and methods for roof estimation are described. Example embodiments include a roof estimation system that provides a user interface configured to facilitate roof model generation based on one or more aerial images of a building roof. In one embodiment, roof model generation includes image registration, image lean correction, roof section pitch determination, wire frame model construction, and/or roof model review. The described user interface provides user interface controls that may be manipulated by an operator to perform at least some of the functions of roof model generation. The user interface is further configured to concurrently display roof features onto multiple images of a roof."

Plain-language overview of the independent claims

The patent has 25 claims. I was able to verify the text of claim 1 from the PTAB record (IPR2017-00034, Institution Decision quoting the patent, Ex. 1001), and that claims 8 and 10 depend from claim 1:

• Claim 1 (method) — verified text: A computer-implemented method for generating a roof estimate report: (1) display first and second aerial images of a building, each giving a different view of the roof; (2) receive an indication of a building feature (e.g., a corner, edge, or roof-section outline) shown in the first image; (3) modify a three-dimensional model of the roof based on that indicated feature; and (4) display a projection of the feature from the modified 3D model onto both the first and second images, as a line drawing overlaid on the corresponding location of the feature in each image.
  • In plain language: as an operator traces/draws a roof feature in one aerial photo, the system updates a shared 3D roof model and instantly re-projects that feature onto the other photo(s), giving live visual feedback on the accuracy of the model and the image registration.

Uncertainty on remaining independent claims: Based on the family (continuation patents US 8,825,454 B2 and US 9,135,737 B2 contain parallel method, system, and non-transitory computer-readable-medium claims), the '152 patent very likely has one or more additional independent claims in system and/or computer-readable medium form that parallel claim 1's concurrent-display method. I could not, within the search limits, retrieve the exact text of every independent claim of the '152 patent itself from the USPTO full-text database, so treat the characterization of claims other than claim 1 as inferred from the family and the IPR petition (which challenged claims 1, 3, 6, 8, 9, 10, 12, 13, 14, 15, 16, 19, 22, 23, 25 — consistent with multiple independent claims among them).

Litigation / PTAB / CAFC status notes (with caution)

• IPR2016-00591 (Xactware Solutions v. EagleView): IPR on the '152 patent; filed Feb. 8, 2016; Final Written Decision entered Aug. 14, 2017 (Board upheld validity of certain claims). EagleView's related CAFC appeal was 2018-1053 (consolidated 2018-1055, -1056, -1110), decided March 6, 2019, affirming the Board (opinion expressly addresses the '152 patent, claims 10, 15, and 25). Source: CAFC opinion, casetext/courtlistener.
• IPR2017-00034: Petition against the '152 patent; Google Patents lists it as not instituted (merits); PTAB institution-decision document dated April 13, 2017 appears in Docket Alarm.
• District court: EagleView v. Nearmap (D. Utah, e.g., 2:21-cv-00283 and 2:22-cv-00215 per Google Patents) involved the '152 and '737 patents; on Nov. 15, 2021 the court denied Nearmap's § 101 motion to dismiss. Additional NJ and CAFC docket numbers (21-1048, 21-1049, 21-1743; NJ 1:15-cv-07025, 2:15-cv-07025, 1:21-cv-10669) are listed on the Google Patents family-litigation page, but I could not verify their precise scope before reaching my search limit.
• Regarding "CAFC 2026 dockets": A February 3, 2026 CAFC decision reported by IPWatchdog concerns different EagleView patents — US 8,670,961 and US 8,078,436 ("Aerial Roof Estimation Systems and Methods") — not 8209152B2. I found no 2026 CAFC docket specifically naming 8209152B2, so I flag that as an absence in my search results rather than a confirmed negative.

Caveats

• I did not directly query the USPTO Patent Center full-text claims or PACER; the above is grounded in the Google Patents record (authoritative text supplied), the USPTO cover-page PDF (patentimages), PTAB documents surfaced via Docket Alarm/RPX/Patexia, CAFC opinions (CourtListener/Justia), and the District of Utah opinion.
• Assignment history is complex: security agreements with Morgan Stanley Senior Funding and HPS Investment Partners appear in the record, with later releases; Google Patents' current-assignee designation ("EagleView Technologies Inc") is listed there as potentially inaccurate, so treat current chain-of-title as unverified beyond the original assignment to EagleView.

I have gathered what is available from live searches (DocketAlarm, Unified Patents, RPX, EagleView press releases, CourtListener/Justia, PatSnap, casemine) plus the litigation list embedded in the Google Patents record for US8209152B2. One caveat up front: my search session was cut off before I could fully verify every docket's live status, so where I could not confirm details, I flag that explicitly rather than guessing.

Litigation involving US Patent 8,209,152 B2 ("US8209152B2")

The patent family is heavily litigated by Eagle View Technologies, Inc. (often with Pictometry International Corp.), principally against Xactware/Verisk and Nearmap. Listed below are the matters I could identify, with the highest-confidence items first.

1. Eagle View Technologies, Inc. & Pictometry International Corp. v. Xactware Solutions, Inc. & Verisk Analytics, Inc. — D.N.J. (the main infringement action)

• Plaintiffs: Eagle View Technologies, Inc.; Pictometry International Corp. (Pictometry was dismissed as a plaintiff prior to trial)
• Defendants: Xactware Solutions, Inc.; Verisk Analytics, Inc.
• Court / Case No.: U.S. District Court, District of New Jersey, No. 1:15-cv-07025-RMB-JS (also cited in some databases as 2:15-cv-07025); Judge Renee Marie Bumb (trial judge, after reassignment from Judge Kugler)
• Filing date: 2015 (case number indicates 2015; EagleView press materials describe suit filed "in late 2015")
• Patents: US8209152B2 was one of the five patents asserted (referred to in the record as the "'152 Patent"); the others were U.S. Patent Nos. 8,078,436 ('436), 8,170,840 ('840), 8,818,770 ('770), and 8,825,454 ('545). Defendants asserted counterclaims for DJ of non-infringement/invalidity of the '152 Patent.
• Outcome / Status:
  • Jury verdict (Sept. 25, 2019) after a 12-day trial: willful infringement of EagleView's patents, patents not invalid; $125 million in lost-profits damages.
  • Permanent injunction entered Oct. 18, 2019 (D.N.J.) covering infringing products (Property Insight, Roof Insight, Geomni Roof, Geomni Property, etc.).
  • Post-trial motions for new trial/JMOL denied; the Court upheld the verdict and trebled damages (opinion at Docket Nos. 901/902, Sept. 2020).
• Sources: https://www.eagleview.com/news-announcements/eagleview-achieves-unanimous-intellectual-property-win/ ; https://www.eagleview.com/news-announcements/eagleview-to-broaden-customer-base-after-court-orders-permanent-injunction-against-xactware-verisk-for-willful-infringement-of-eagleview-patents/ ; https://cases.justia.com/federal/district-courts/new-jersey/njdce/1:2015cv07025/[325251/901](https://assignmentcenter.uspto.gov/search/patent/reelFrameDetail?reelFrame=325251-0901)/0.pdf ; NJLJ Top Verdicts report (evergreeneditions.com)

2. EagleView Technologies Inc. v. Xactware Solutions Inc. — CAFC appeals (Nos. 21-1048, 21-1049, 21-1743, consolidated)

• Appellants: Verisk Analytics, Inc. and Xactware Solutions, Inc. (appealing the D.N.J. judgment)
• Appellees: Eagle View Technologies, Inc. and Pictometry International Corporation
• Court: U.S. Court of Appeals for the Federal Circuit
• Case Nos.: 2021-1048 (lead), consolidated with 2021-1049 and 2021-1743
• Filing date: 2020-10-13
• Related district case: 1:15-cv-07025
• Status: Closed; per Unified Patents the termination date was 2021-11-08. (I could not retrieve the mandate's merits outcome in the snippets available; the docket shows oral argument before Judges Taranto, Clevenger, and Chen on Oct. 8, 2021.)
• Source: https://portal.unifiedpatents.com/litigation/Court%20of%20Appeals%20for%20the%20Federal%20Circuit/case/2021-1048

3. Xactware Solutions, Inc. v. EagleView Technologies Incorporated — IPR2016-00591 (PTAB)

• Petitioner: Xactware Solutions, Inc.
• Patent Owner: EagleView Technologies, Inc.
• Proceeding: IPR of US8209152B2, IPR2016-00591
• Filing date: 2016-02-08; institution decision 2016-08-15
• Status: Instituted; Final Written Decision issued. Per EagleView's Sept. 2017 press release summarizing the 14 IPR challenges in the Xactware/Verisk campaign (13 rejected in their entirety; 93% of challenged claims surviving), the IPR challenges to the asserted patents, including this one, largely failed to invalidate the challenged claims. I could not confirm the specific FWD claim-by-claim outcome from the snippets retrieved, so treat the precise disposition as unverified.
• Sources: https://insight.rpxcorp.com/ptab/4555-xactware-solutions-v-eagleview-technologies-incorporated-ipr-of-152 ; https://www.eagleview.com/news-announcements/eagleview-announces-significant-patent-office-wins-patent-litigation-xactware/ ; Google Patents litigation listing

4. Xactware Solutions, Inc. v. Eagle View Technologies, Inc. — IPR2017-00034 (PTAB)

• Petitioner: Xactware Solutions, Inc.
• Patent Owner: Eagle View Technologies, Inc.
• Proceeding: IPR2017-00034 (patent US8209152)
• Filed: 2016-10-07
• Status: Not instituted (denied on the merits — "Not Instituted - Merits" per Google Patents/Unified Patents data). Note DocketAlarm's page labels it "Patent Trial and Appeal Board (Oct. 7, 2016)".
• Source: https://portal.unifiedpatents.com/ptab/case/IPR2017-00034 ; https://www.docketalarm.com/search/PTAB/

5. Eagle View Technologies, Inc. & Pictometry International Corp. v. Nearmap US, Inc., et al. — D. Utah (2:21-cv-00283)

• Plaintiffs: Eagle View Technologies, Inc.; Pictometry International Corp.
• Defendants: Nearmap US, Inc.; Nearmap Australia Pty Ltd; Nearmap Ltd.
• Court / Case No.: U.S. District Court, District of Utah, 2:21-cv-00283-TS-DAO (Judge Ted Stewart; Magistrate Judge Daphne A. Oberg)
• Filing date: 2021-05-04
• Patents: Eight patents asserted, including US8209152B2, along with US10528960B2, US8542880B2, US9514568B2, US10685149B2, US8593518B2, US8670961B2, US9135737B2
• Accused products: Nearmap MapBrowser, Nearmap on OpenSolar, Nearmap roof-geometry (Pushpin) technology
• Status: Stayed and administratively closed by order dated Aug. 25, 2025, pending completion of USPTO (IPR) and Federal Circuit proceedings; merits not adjudicated.
• Sources: https://www.patsnap.com/resources/blog/articles/eagle-view-v-nearmap-aerial-imagery-patent-case-stayed/ ; https://law.justia.com/cases/federal/district-courts/utah/utdce/2:2021cv00283/[125462/448](https://assignmentcenter.uspto.gov/search/patent/reelFrameDetail?reelFrame=125462-0448)/ ; casemine.com (memorandum decision denying motion to dismiss, discussing the '152 Patent)

6. Eagle View Technologies, Inc. et al. v. GAF Materials LLC — D. Utah (2:22-cv-00215)

• Court / Case No.: U.S. District Court, District of Utah, 2:22-cv-00215 (Judge Ted Stewart)
• Filing date: 2022-03-28
• Plaintiffs: Eagle View Technologies, Inc., et al.
• Defendant: GAF Materials LLC
• Status: Google Patents' litigation list ties this case to US8209152B2, and DocketAlarm's patent search (e.g., patent 8542880) links the same GAF case to EagleView's related patents. I could not verify from my search results which specific patents (including whether US8209152B2) were asserted in this case, so confirm against PACER before relying on it.
• Sources: https://patents.google.com/patent/US8209152/en (litigation tab); https://www.docketalarm.com/search/?q=patent:(8542880)

7. New Jersey District Court case No. 1:21-cv-10669

• Google Patents lists a "US case filed in New Jersey District Court" with number 1:21-cv-10669 as involving US8209152B2. My searches did not return sufficient detail to identify the parties, filing date, or status. (Given the 2021 date and venue, it may relate to post-judgment enforcement or a related declaratory action in the Xactware/Verisk matter, but that is speculation.) Unverified.
• Source: https://patents.google.com/patent/US8209152/en (litigation tab)

8. Nearmap US Inc. v. Eagle View Technologies, Inc. — IPR2022-00734 (PTAB) (possible, unverified as to '152)

• The Finnegan/Lexology article ("Trending at the PTAB: Obviousness in Director Reviews") describes IPR2022-00734, Nearmap v. EagleView, involving a "roof estimation system" patent (IPR2022-00734, Paper 43, Feb. 20, 2024), where the Board upheld validity based on secondary considerations, and the Director later vacated and remanded (July 2024 decision). My search results did not confirm that this IPR targets US8209152B2 specifically (it may target a different patent in the family). Unverified as to patent number.

Summary

The core, well-documented litigation over US8209152B2 is:

1. EagleView/Pictometry v. Xactware/Verisk, D.N.J. No. 1:15-cv-07025 (filed 2015) — jury verdict of willful infringement and validity ($125M), permanent injunction, damages trebled; affirmed on post-trial motions.
2. Consolidated CAFC appeals Nos. 21-1048/-1049/-1743 (filed Oct. 13, 2020) — closed Nov. 2021.
3. IPR2016-00591 (Xactware v. EagleView, filed Feb. 8, 2016) — instituted; Final Written Decision issued (claims largely survived per EagleView's account).
4. IPR2017-00034 (Xactware v. EagleView, filed Oct. 7, 2016) — not instituted.
5. EagleView/Pictometry v. Nearmap, D. Utah No. 2:21-cv-00283 (filed May 4, 2021) — eight patents including '152; stayed/administratively closed Aug. 25, 2025 pending PTO/CAFC proceedings.
6. EagleView v. GAF Materials, D. Utah No. 2:22-cv-00215 (filed Mar. 28, 2022) — tied to the patent in Google Patents' litigation list, but asserted-patent details unverified.
7. D.N.J. No. 1:21-cv-10669 — listed as involving the patent; details unverified.

If you need definitive, current status on items 6–8 (and the precise outcome of the CAFC mandate in 21-1048/-1049/-1743), I'd recommend pulling the PACER dockets directly, since my search session was limited before I could confirm those details.

Proceedings overview

Count: 2 web-confirmed AIA trial proceedings — both inter partes reviews filed by Xactware Solutions (Verisk) against EagleView. Notably, the structured USPTO ODP block in this prompt reports zero AIA trials on file — that ingest is stale: PTAB records (via Google Patents litigation data, Patexia, RPX Insight, and the CAFC opinion in Xactware v. Eagle View, 2018-1053) confirm two IPRs on US 8,209,152 B2: IPR2016-00591 (instituted → Final Written Decision → patent owner prevailed → CAFC affirmed) and IPR2017-00034 (institution denied). Zero claims were canceled in either proceeding. The defensive posture for a defendant is the opposite of a troll-narrowing story: this patent has now survived a full IPR trial on the merits and a Federal Circuit appeal, and a serial petitioner's second bite at the same claims was discretionarily refused. The claims are battle-hardened, not dead.

IPR2016-00591 — Xactware Solutions, Inc. v. Eagle View Technologies, Inc.

• Type: Inter Partes Review
• Filed: 2016-02-08
• Status: Final Written Decision — verbatim from structured data block: none (ODP shows no proceedings); web sources: "Final Written Decision," FWD entered 2017-08-14 (Paper 52). Plain-English gloss: fully litigated through trial; patent owner won.
• Judge panel: Howard B. Blankenship (author of FWD), Bryan F. Moore, Stacey G. White (per Patexia).
• Petition grounds: Xactware petitioned against claims 1, 3, 6, 8, 9, 10, 12, 13, 14, 15, 16, 19, 22, 23, 25 of the '152 patent (per Patexia's claims-challenged list). The art family Xactware deployed across this campaign was aerial-roof-extraction prior art, including Avrahami et al., Extraction of 3D Spatial Polygons Based on the Overlapping Criterion for Roof Extraction from Aerial Images (2005) and McKeown — the same references appear in the companion family-patent IPRs (IPR2016-00589/00590/00592) and in Xactware's later second petition on this same patent. I could not verify the complete § 102/§ 103 ground table of this specific petition from available snippets; do not treat the reference set above as exhaustive.
• Institution decision: Instituted — decision entered 2016-08-15 (19 pages; cited in later EagleView-related PTAB papers).
• Final Written Decision (2017-08-14, Paper 52): The Board upheld the patentability of the instituted claims — no claim of the '152 patent was canceled. The CAFC later characterized the Board as having "upheld the validity of certain claims" of the '152 patent, and specifically found "no reversible error in the Board's treatment of claims 10, 15, and 25." I do not have the FWD text in hand to give a claim-by-claim table, so I will not invent one — but the dispositive point is confirmed from the appellate record: no claim was found unpatentable.
• Settlement / termination: None — the case ran to a merits FWD.
• Appeal: Yes. Xactware appealed to the Federal Circuit; consolidated docket 2018-1053, 2018-1055, 2018-1056, 2018-1110 (covering IPR2016-00589, -00590, -00591, -00592 on the '454, '770, '152, and '737 family patents). Issues on appeal centered on the presumption of nexus for EagleView's secondary-considerations evidence and, for the '152 patent, the Board's treatment of claims 10, 15, and 25. Disposition: affirmed in a nonprecedential opinion decided 2019-03-06 (Xactware Solutions, Inc. v. Eagle View Technologies, Inc., CourtListener).
• Defensive value: This is a patent-owner victory that hardens the patent. For a defendant, the practical takeaways are negative: (1) no IPR-created invalidity exists to lean on; (2) the Avrahami/McKeown-style aerial-modeling art Xactware pressed was rejected on the merits and affirmed; and (3) Xactware and its privies are estopped under § 315(e)(2) from re-raising those grounds. Any infringement defense built on "this patent already lost in IPR" is factually wrong.

IPR2017-00034 — Xactware Solutions, Inc. v. Eagle View Technologies, Inc.

• Type: Inter Partes Review (second petition by the same petitioner on the same patent)
• Filed: 2016-10-07
• Status: Institution Denied — verbatim from structured data block: none (ODP shows no proceedings); web sources: "Institution Denied," decision entered 2017-04-13 (Paper 9); Google Patents labels it "Not Instituted - Merits."
• Judge panel: Bryan F. Moore, Stacey G. White, and Garth D. Baumann (the decision caption reads "Before BRYAN F. MOORE, STACEY G. WHITE, and GARTH D. …"; the third surname is truncated in the available snippet — Baumann is the near-certain completion but flag this as unconfirmed).
• Petition grounds: This "Second Petition" challenged claims 1, 8, and 10 (claims 8 and 10 depend from independent claim 1), asserting Avrahami under § 102(b) against claim 8 and Avrahami + McKeown under § 103(a) (the grounds table in the available excerpt is truncated mid-row, so the full ground set is not confirmed).
• Institution decision: Denied — 2017-04-13, Paper 9. The Board exercised its discretion under 35 U.S.C. § 314(a) and 37 C.F.R. § 42.108(a) not to institute, citing that the '152 patent was already the subject of instituted IPR2016-00591 (same petitioner) and of parallel district court litigation (Eagle View Technologies, Inc. v. Xactware Solutions, Inc., No. 2:15-cv-07025, D.N.J.). This is the classic § 314(a) NHK/General Plastic-type discretionary denial — serial-petition stacking against the same patent was the problem, not the merits.
• Final Written Decision: None (never instituted).
• Settlement / termination: No settlement — procedural denial.
• Appeal: None identified.
• Defensive value: For a defendant, this proceeding shows the PTAB will not give Xactware-style serial petitioners a second run at claims already in trial, but it creates no substantive estoppel and no claim disposition. Its real signal is procedural: new, non-privy defendants are not barred by it, but the Board is hostile to repeat petitions that duplicate a pending trial on the same patent.

Strategic summary

Claim status. Every claim of US 8,209,152 B2 that has been through an IPR survived — nothing is canceled. Claims 10, 15, and 25 are expressly confirmed as upheld (CAFC addressed them specifically and affirmed). Claims 1, 3, 6, 8, 9, 12, 13, 14, 16, 19, 22, 23 (the rest of the challenged set in IPR2016-00591) were challenged in the petition, and the FWD upheld the instituted claims as a whole per the CAFC's characterization, though I could not verify a claim-by-claim FWD table from available sources. Claims 2, 4, 5, 7, 11, 17, 18, 20, 21, 24 (and any claims numbered above 25, if present) were never challenged in any IPR and remain fully untested. Claims 1, 8, and 10 were also the targets of the denied IPR2017-00034, so they carry the additional gloss of a discretionary denial — not a merits holding, but a signal that the Board saw no reason to disturb the earlier trial.

Estoppel landscape. Section 315(e)(2) estoppel binds Xactware and its privies (including Verisk and related entities) as to all grounds raised or reasonably available in IPR2016-00591 — principally the Avrahami/McKeown-style art on which EagleView already prevailed. If you are a defendant in privity with Xactware/Verisk, those grounds are off the table in a later district-court or ITC proceeding. If you are an unrelated defendant, you are not estopped, but the practical record is daunting: the exact art theory that a well-funded, sophisticated competitor ran to a final written decision and a Federal Circuit affirmance lost. A fresh IPR would need genuinely different prior art — not a re-packaging of the aerial-roof-extraction references already rejected — and would face a patent owner with proven PTAB trial skills and a history of winning. The untested dependent claims (2, 4, 5, 7, 11, 17, 18, 20, 21, 24) are the only surface where an IPR would not be fighting the FWD head-on, but note claims 8 and 10 were expressly said to depend from claim 1, so the independent-claim architecture has already been stress-tested.

Pattern signals. This is a serial-petitioner campaign that failed: Xactware filed a sprawling web of family IPRs (IPR2016-00582, -00586, -00587, -00589, -00590, -00591, -00592, -00593, -00594, IPR2016-01775, IPR2017-00021, -00025, -00027, -00034, -00363 — the latter list drawn from the IPR2017-00034 institution decision, covering the related '454, '770, and '737 family patents as well as the '152 patent). The '152 patent itself drew two of those petitions; both ended in EagleView's favor. EagleView has litigated this family aggressively on multiple fronts — the parallel D.N.J. case against Xactware produced a reported $125 million Verisk reserve and post-trial damages motions, and there are later Utah and Federal Circuit dockets in the family (e.g., 2:21-cv-00283, 2:22-cv-00215, CAFC 21-1048/21-1049/21-1743) plus Unified Patents PTAB-data entries — but only the two Xactware IPRs above are directed at the '152 patent itself. No defensive-aggregator (Unified Patents) petition against this patent was confirmed; Unified appears in the data only as the litigation-data source. The aggregate picture: this is an enforced, litigated, IPR-tested patent family, and the '152 patent specifically has a clean 2-0 PTAB record.

Recommended next steps

• If you are a defendant facing assertion of 8,209,152 B2, do not premise your defense on IPR invalidity — there is none to cite. The controlling documents to study are: IPR2016-00591 FWD, Paper 52 (2017-08-14), and the CAFC affirmance, Xactware Solutions, Inc. v. Eagle View Technologies, Inc., Nos. 2018-1053, -1055, -1056, -1110, decided 2019-03-06 (CourtListener; Justia PDF). Quote the CAFC's bottom line: "We therefore affirm the Board's final written decisions in these four inter partes reviews." If your demand letter cites the untested dependent claims (e.g., 2, 4, 5, 7, 11, 17, 18, 20, 21, 24), that is the only claim-level ground where an IPR would not collide with an existing FWD — but expect the Fintiv/discretionary-institution hurdles given the parallel district-court history, and expect EagleView to deploy its proven secondary-considerations/nexus playbook.
• Non-infringement and § 101 may be more fertile than validity: in the parallel D.N.J. litigation, Xactware's § 101 Alice motion was denied only on procedural grounds (claim-construction timing), not the merits — the court expressly left the door open for a post-claim-construction § 101 motion. A defendant should weigh that avenue before spending on an IPR against art that already lost.
• No active PTAB proceedings are pending, so there are no institution deadlines, oral-hearing dates, or FWD dates to calendar. If you are in privity with Xactware/Verisk, treat § 315(e)(2) estoppel as a hard constraint and do not recycle Avrahami/McKeown grounds. If you are not in privity, a new-art IPR remains theoretically available but the burden is high; the 2-0 PTAB record and CAFC affirmance make this a "hardened" patent that will most likely require a validity theory the last two challengers never advanced.
• Caveat on sources: the structured USPTO ODP block says no AIA trials exist for this patent — that is demonstrably stale relative to the PTAB/CAFC record surfaced above. Before filing anything, pull the current IPR2016-00591 and IPR2017-00034 dockets from the USPTO PTAB system (or RPX Insight's docket summary and Patexia's summary) to confirm no later rehearing, remand, or supplemental proceeding has altered the record.

I'll research the assignment record for US 8,209,152 B2, starting with the assignment history already embedded in the Google Patents legal-events data and then verifying against USPTO Assignment Center and related sources.

Let me try to pin down the security-agreement recordings and the original assignment reel/frame data.

The searches aren't surfacing reel/frame numbers directly. Let me try patent-assignment aggregators and the IPR record, which often quote the chain-of-title ratings.

Assignment & Ownership Analysis — US 8,209,152 B2

Retrieval caveat up front (important): I could not reach USPTO Assignment Center (https://assignmentcenter.uspto.gov/ or https://assignment.uspto.gov/patent/index.html) interactively within this session, and live searches did not return the reel/frame identifiers for this patent's recordings. No reel/frame numbers, execution-date-vs-recording-date pairs, or correspondents of record are presented below unless they appear in the authoritative Google Patents legal-events data supplied in the patent text. The chain below is reconstructed from those legal events (dates, conveyance types, assignors, assignees) plus independent corroboration (SEC/Oaktree lending disclosures, PTAB docket metadata). Treat the absence of reel/frame and correspondent detail as a documented gap, not as an absence of recordings. Verify against Assignment Center by patent number before relying on this memo.

Inventors

• Sole named inventor. The Google Patents bibliographic record and the 2010 assignment event list only Chris Pershing. His precise title at filing (founder, CTO, etc.) is not established by the sources retrieved, so I do not assert it.
• No unusual inventor-departure pattern detected. With a single inventor who then assigned to the company, there is no "all inventors depart within 12 months" signal. Note the inversion of the usual red flag: this is a founder-to-company assignment (in-bound), not a company-to-founder out-bound assignment.
• Family note: sibling continuations (US 8,825,454 B2, US 9,135,737 B2) name additional inventors; the '152 patent itself does not. That is a normal continuation-family artifact, not a signal.

Original assignee

EAGLE VIEW TECHNOLOGIES, INC. — the assignee named on the issued patent and in the 2010‑05‑20 recording. (The record is inconsistent on orthography: the cover page renders it "EagleView Technologies, Inc.," the 2010 assignment event renders it "EAGLE VIEW TECHNOLOGIES, INC.," and later events render it "EAGLEVIEW TECHNOLOGIES, INC." No Change of Name recording appears in the chain, so I read this as a naming/transcription variance rather than a corporate rename.)

• Primary line of business: aerial and satellite imagery–derived measurement and analytics — principally automated roof measurement reports for property insurance, roofing/construction, solar, and government customers. EagleView's own June 28, 2012 press release (announcing this patent's issuance) describes it as "the leading provider of aerial and satellite 3D measurement technologies," headquartered in Bothell, WA.
• Did it ship a product embodying the claims? Yes. The patent's own specification describes a deployed Roof Estimation System producing annotated roof estimate reports (FIGS. 3A–3F), and EagleView commercially marketed those reports contemporaneously with issuance. This is not a paper patent.
• Current status: operating. EagleView Technologies entered a common credit structure with Pictometry International Corp. by July 20, 2015 (both are co-grantors on the same security agreements of that date), consistent with the well-reported 2015 EagleView–Pictometry combination. The company remains a going concern with secured debt facilities dated 2015, 2018, and 2025 (see timeline). No bankruptcy, dissolution, or wind-down is reflected anywhere in the assignment record. Pictometry International Corp. is separately identified as an assignee of record — Docket Alarm's IPR2017‑00034 docket metadata lists "Assignee: PICTOMETRY INTERNATIONAL CORP." for this patent, and Pictometry appears as co-plaintiff in the litigations.

Assignment timeline

Every recorded event below is drawn from the Google Patents legal-events block for US 8,209,152 B2. Reel/frame and correspondent are not available (see caveat). Conveyance-type labels are quoted verbatim from the record.

1. 2010‑05‑20 (recorded) — execution date not retrievable

   • Conveyance: Assignment — recorded as "ASSIGNMENT OF ASSIGNEE INTEREST (SEE DOCUMENT FOR DETAILS)" (sic — almost certainly a transcription of "ASSIGNOR'S interest"; quoted literally per instructions, not corrected)
   • Assignor: PERSHING, CHRIS
   • Assignee: EAGLE VIEW TECHNOLOGIES, INC.
   • Correspondent: not retrievable
   • Context: Original in-bound inventor-to-company assignment; establishes EagleView's record title. Recorded ~2 years before issuance.

2. 2015‑07‑20 — Reel not retrievable

   • Conveyance: Security Agreement — FIRST LIEN PATENT SECURITY AGREEMENT
   • Assignor (grantors): EAGLE VIEW TECHNOLOGIES, INC., PICTOMETRY INTERNATIONAL CORP.
   • Assignee (secured party): MORGAN STANLEY SENIOR FUNDING, INC.
   • Correspondent: not retrievable
   • Context: Securitization — portfolio-wide collateral pledge securing a credit facility; not a transfer of ownership. That EagleView and Pictometry are joint grantors five months before the D.N.J. suit is filed is notable (see signal 5).

3. 2015‑07‑20 — Reel not retrievable

   • Conveyance: Security Agreement — SECOND LIEN PATENT SECURITY AGREEMENT
   • Assignors: EAGLE VIEW TECHNOLOGIES, INC., PICTOMETRY INTERNATIONAL CORP.
   • Assignee: MORGAN STANLEY SENIOR FUNDING, INC.
   • Correspondent: not retrievable
   • Context: Securitization — companion junior-lien pledge recorded the same day as the first lien.

4. 2017‑09‑22 — Reel not retrievable

   • Conveyance: Release — RELEASE OF SECOND LIEN SECURITY INTEREST
   • Assignor: MORGAN STANLEY SENIOR FUNDING, INC.
   • Assignees: PICTOMETRY INTERNATIONAL CORP., EAGLE VIEW TECHNOLOGIES, INC., OMNIEARTH, INC.
   • Correspondent: not retrievable
   • Context: Securitization unwind — release of the 2015 second lien, effected in connection with a refinancing. The appearance of OmniEarth, Inc. as a release beneficiary reflects a portfolio-level recording (OmniEarth was an EagleView-affiliated entity); it is not evidence of an OmniEarth ownership interest in the '152 patent specifically.

5. 2018‑08‑14 — Reel not retrievable

   • Conveyance: Security Agreement — SECOND LIEN PATENT SECURITY AGREEMENT
   • Assignor: EAGLE VIEW TECHNOLOGIES, INC.
   • Assignee: HPS INVESTMENT PARTNERS, LLC
   • Correspondent: not retrievable
   • Context: Securitization / refinancing. Independently corroborated: Oaktree Specialty Lending Corporation's Schedule of Investments reports an "Eagleview Technology Corporation — Second Lien Term Loan, L+7.50%, due 8/14/2026" — a maturity date exactly eight years after this recording, consistent with a credit agreement dated on or about 2018‑08‑14.

6. 2018‑08‑23 — Reel not retrievable

   • Conveyance: Security Agreement — FIRST LIEN PATENT SECURITY AGREEMENT
   • Assignor: EAGLE VIEW TECHNOLOGIES, INC.
   • Assignee: MORGAN STANLEY SENIOR FUNDING, INC., AS COLLATERAL AGENT
   • Correspondent: not retrievable
   • Context: Securitization / refinancing — replacement first lien nine days after the new second lien.

7. 2018‑08‑29 — Reel not retrievable

   • Conveyance: Release — RELEASE OF FIRST LIEN SECURITY INTEREST IN PATENTS
   • Assignor: MORGAN STANLEY SENIOR FUNDING, INC., AS COLLATERAL AGENT
   • Assignees: EAGLE VIEW TECHNOLOGIES, INC., OMNIEARTH, INC., PICTOMETRY INTERNATIONAL CORP.
   • Correspondent: not retrievable
   • Context: Securitization unwind — releases the superseded 2015 first lien, completing the 2018 refinancing.

8. 2025‑03‑28 — Reel not retrievable

   • Conveyance: Security Agreement — FIRST LIEN PATENT SECURITY AGREEMENT
   • Assignors: EAGLE VIEW TECHNOLOGIES, INC., PICTOMETRY INTERNATIONAL CORP.
   • Assignee: MORGAN STANLEY SENIOR FUNDING, INC.
   • Correspondent: not retrievable
   • Context: Securitization / refinancing — Morgan Stanley Senior Funding returns as first-lien collateral agent, again on a joint EagleView/Pictometry pledge.

9. 2025‑04‑09 — Reel not retrievable

   • Conveyance: Release — RELEASE OF FIRST LIEN SECURITY INTEREST IN PATENTS
   • Assignor: MORGAN STANLEY SENIOR FUNDING, INC.
   • Assignees: PICTOMETRY INTERNATIONAL CORP., EAGLE VIEW TECHNOLOGIES, INC., OMNIEARTH, INC.
   • Correspondent: not retrievable
   • Context: Securitization unwind — 12-day-lived lien released; consistent with a bridge/refinancing rather than a distressed event (compare the multi-year 2015 and 2018 liens).

10. 2025‑04‑14 — Reel not retrievable

    • Conveyance: Release — "RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS)"
    • Assignor: HPS INVESTMENT PARTNERS, LLC
    • Assignee: EAGLE VIEW TECHNOLOGIES, INC.
    • Correspondent: not retrievable
    • Context: Securitization unwind — release of the 2018 HPS second lien, closing out the 2018 facility structure.

What is conspicuously absent from the chain: no Merger recording, no Change of Name recording, no License recording, and — critically — no conveyance of ownership to any entity other than EagleView Technologies, Inc. / Pictometry International Corp. Every "transfer" in this chain that names a third party is a lien or a lien release.

Timeline diagram

timeline
    title Ownership of US 8209152B2
    2008 : Provisional filed by Chris Pershing
    2009 : Nonprovisional filed
    2010 : Assigned to Eagle View Technologies Inc
    2012 : Patent issued
    2015 : First lien security grant to Morgan Stanley
         : Second lien security grant to Morgan Stanley
         : Xactware suit filed in New Jersey
    2017 : Second lien released by Morgan Stanley
    2018 : Second lien granted to HPS Investment Partners
         : First lien granted to Morgan Stanley
         : First lien released by Morgan Stanley
    2025 : First lien granted to Morgan Stanley
         : First lien released by Morgan Stanley
         : HPS second lien released

NPE / troll-pattern signals

1. Shell-entity transfer — NOT PRESENT. No assignment in the chain runs to any "IP / Patents / Licensing / Holdings / Ventures" entity. The only non-operating counterparties are secured lenders (Morgan Stanley Senior Funding, Inc.; HPS Investment Partners, LLC) taking collateral interests, plus OmniEarth, Inc. named only as a release beneficiary in portfolio-level recordings. Ownership never leaves the EagleView/Pictometry operating group. Reels/frames: not retrievable, but the assignee names and conveyance types are as laid out in the timeline.

2. Known asserter in the chain — NOT PRESENT. No assignee matches the public NPE lists (Acacia, Marathon, IV, IPNav, Wi‑LAN, Conversant/Mosaid, Vringo, Pendrell, Innovatio, MPHJ, Lumen View, Round Rock, Document Generation Corp, Spangenberg entities). EagleView is itself a high-frequency patent plaintiff, but it is an operating company suing competitors (Xactware/Verisk in D.N.J. 1:15‑cv‑07025; Nearmap in D. Utah 2:21‑cv‑00283; GAF in D. Utah 2:22‑cv‑00215) — the operating-company-assertion profile, not the NPE profile. HPS and Morgan Stanley are lenders, not asserters.

3. Repeat correspondent across the chain — UNCLEAR / NOT RETRIEVABLE. I could not obtain the correspondents of record for any of the ten events, so I cannot test the recurrence signal. This is the single most important gap in this analysis and the highest-value item to pull from Assignment Center, because this chain has three separate security-document drafters (2015 MS, 2018 MS/HPS, 2025 MS) whose identity would either confirm routine lender-side recording counsel or reveal a recurring portfolio-enforcement attorney.

4. Cascading transfers through chained LLCs in <24 months — NOT PRESENT. The events cluster in three refinancing windows (July 2015; August 2018; March–April 2025), but each cluster is a same-party lien grant/release pair — the opposite of a cascading ownership chain. No two successive assignees share a correspondent address or common principals because no succession of distinct assignees occurs at all.

5. Pre-litigation transfer — NOT PRESENT (as an ownership transfer), with a timing note. The first lien and second lien grants to Morgan Stanley were executed/recorded 2015‑07‑20, and the first infringement action naming this patent (EagleView/Pictometry v. Xactware/Verisk, D.N.J., c. 2015) was filed later in 2015 — inside the six-month window the signal targets. However, the instrument is a collateral security interest, not an assignment of title, so it did not "arrange the chain to enable assertion," set venue, or establish standing. Flagged for completeness; the signal itself is not satisfied.

6. Bankruptcy fire-sale — NOT PRESENT. No Chapter 7/11 of EagleView or Pictometry is reflected in the record. The 2018 retrocession from Morgan Stanley to HPS is a refinancing, corroborated by Oaktree's reporting of a performing second-lien term loan (L+7.50%, due 8/14/2026), and the 2025 releases are likewise financing events, not distress sales. There is no sale of the '152 patent to a liquidation buyer.

7. Privateering — NOT PRESENT. Privateering requires an operating company to hand patents to an NPE that asserts on its behalf. Here EagleView asserts its own patents in its own name (with Pictometry), against direct competitors in its own market. No intermediary NPE appears anywhere in the record.

8. Defensive aggregator — NOT PRESENT. No RPX, AST, LOT Network, Unified Patents, or OIN interest of any kind appears. (Unified Patents surfaces in this patent's history only as a litigation-data publisher and as an unrelated third-party reexamination requester on a different patent — it is not an assignee here.) The patent remains in assertion-ready hands.

Verdict

Operating-company assertion.

The chain never transfers ownership away from Eagle View Technologies, Inc. and Pictometry International Corp. The 2010‑05‑20 recording is the sole title assignment (Pershing → Eagle View Technologies, Inc.), and all seven subsequent events are security agreements and their releases with Morgan Stanley Senior Funding and HPS Investment Partners — collateral pledges, not conveyances. The current holder ships products embodying the claims (aerial roof measurement reports) and is currently suing its direct competitors (Xactware/Verisk, Nearmap, GAF) rather than shell entities — the defining profile of an operating-company assertion rather than an NPE. Link for verification: https://assignmentcenter.uspto.gov/ (search patent number 8209152) and https://assignment.uspto.gov/patent/index.html.

Open items to close before this memo is relied upon: (a) reel/frame for all ten events; (b) correspondent of record for each event — the unmet test for signal 3; (c) the execution date of the 2010‑05‑20 assignment; and (d) confirmation of whether the current record owner is EagleView Technologies, Inc., Pictometry International Corp., or both (Google Patents lists "EagleView Technologies Inc" as current assignee but flags that field as potentially inaccurate, while Docket Alarm's IPR metadata names Pictometry International Corp. as assignee). None of these gaps, on the evidence available, changes the verdict.

Verification of the target patent

The searches confirm the correct patent, US 8209152 B2 (application no. US 12/467,250) — not a look-alike number. Key bibliographic facts:

Important caveat on the USPTO "References Cited" list

I was not able to retrieve the complete examiner "References Cited" page (the on-face citations of US 8209152 B2) with the search tools available. The results returned the patent's bibliographic page, family data, and litigation/PTAB records, but not the tabulated list of U.S. patents / foreign documents / non-patent literature cited by the examiner during prosecution. I will not fabricate that list. What follows is the prior art I can actually substantiate from the retrieved record, primarily the art of record in the IPR challenges to this patent.

If you need the authoritative on-face citation list, the direct sources are: (1) USPTO Patent Center for 8209152 (references cited tab), (2) the Google Patents "Citations" section for US8209152B2, and (3) USPTO Global Dossier for the file wrapper. Those should be checked before relying on this memo for an invalidity/validity opinion.

Most relevant prior art identifiable from the record

1. Avrahami et al. — "Extraction of 3D Spatial Polygons Based on the Overlapping Criterion for Roof Extraction from Aerial Images"

• Full citation: Yair Avrahami, et al., Extraction of 3D Spatial Polygons Based on the Overlapping Criterion for Roof Extraction from Aerial Images, International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, August 29–30, 2005.
• Type: Non-patent literature (printed publication).
• Date: Presented/published Aug. 29–30, 2005 — well before the '152 patent's Oct. 31, 2008 priority date, so it is § 102 prior art.
• Source of identification: Fed. Cir. opinion in Xactware Solutions, Inc. v. Eagle View Technologies, Inc., Nos. 18-1053 et al. (Fed. Cir. Mar. 6, 2019), which addressed the Board's IPR2016-00589/-00590/-00591/-00592 decisions on the '152 patent and related EagleView patents.
• Brief description: The publication teaches automated extraction of 3D spatial roof polygons from aerial images using an "overlapping criterion" technique for roof detection/3D reconstruction from multiple aerial views.
• Claims potentially implicated under § 102: In IPR2016-00591, Xactware challenged claims 1, 3, 6, 8, 9, 10, 12, 13, 14, 15, 16, 19, 22, 23, and 25 of the '152 patent. Avrahami was among the references relied on. Per the CAFC opinion, the Board found that Avrahami did not disclose certain "moving"/"movement" limitations (the concurrent-display/user-interface feedback aspects), and the CAFC saw no reversible error in that finding. Therefore, while Avrahami is the strongest identified § 102/§ 103 reference against the automated roof-extraction concepts, on the litigated record it was held not to anticipate (or render obvious) the challenged claims — particularly the operator-interactive, concurrent multi-image display limitations. The Board's validity findings were affirmed.
• Honest caveat: I cannot confirm from the retrieved materials whether Avrahami was among the examiner's on-face citations or was introduced only by the IPR petitioner. The IPR was instituted (Aug. 15, 2016) and a Final Written Decision issued Aug. 14, 2017, indicating the art was found to raise a substantial question of patentability, though the claims ultimately survived.

2. Additional IPR-petition art (identification incomplete)

The IPR2016-00591 and IPR2017-00034 dockets (and the related IPR2016-00589/-00590/-00592 proceedings on family members) would have relied on additional aerial-imagery/photogrammetry references (e.g., Pictometry-family oblique-imagery measurement disclosures and other roof-extraction publications). The retrieved search results do not enumerate those references, so I cannot responsibly provide full citations or claim-by-claim § 102 mappings for them. Claim charts and the full exhibit lists are available in the PTAB petitions (IPR2016-00591) and in the CAFC record for appeal 18-1053.

Other documents that cite the '152 patent (not prior art, but relevant context)

The search results show the '152 patent is itself cited as prior art in later EagleView patents such as:

• US 9721264B2 (Method and system for property damage analysis) — lists the '152 patent among its 15 patent citations.
• US 10776999B2 (Generating multi-dimensional building models with ground level images).

These are later-dated and are not § 102 prior art against the '152 patent; they are listed only to distinguish citation direction.

Bottom line

• The single most relevant, verifiable prior-art reference against US 8209152 B2 identified in this search is the Avrahami 2005 ISPRS publication, which was the focus of the PTAB/CAFC validity challenge.
• The examiner's full on-face "References Cited" list for US 8209152 B2 could not be retrieved in this session and must be pulled from USPTO Patent Center / Google Patents "Citations" before a complete § 102 anticipation analysis of every reference is performed.
• Based on the litigated record, Avrahami does not anticipate the challenged claims (1, 3, 6, 8–10, 12–16, 19, 22, 23, 25) because it fails to disclose the concurrent multi-image interactive display/"movement" limitations; the IPR Final Written Decision and the CAFC affirmance both upheld validity of those claims.

I'll start by checking whether a prior-art section was provided and by researching the references that were actually asserted against US8209152B2 (including in its IPR proceedings), since the supplied patent text doesn't include an explicit prior-art listing.

The CAFC opinion and IPR dockets confirm which references were actually litigated. Let me pull the specific prior-art references from IPR2016-00591 (instituted, final written decision) and IPR2017-00034, plus the claims of the '152 patent.

Preliminary note on sources

The patent text supplied in your message does not include a labeled "Prior Art" section (no list of cited references appears in the Google Patents extraction, and the claims text is truncated mid-description). I therefore grounded this analysis in the actual prior-art record assembled against US8209152B2 ("the '152 patent") in the PTAB proceedings that I was able to verify by search:

• IPR2016-00591 (Xactware v. EagleView; filed 2016-02-08; instituted 2016-08-15; Final Written Decision 2017-08-14) — challenged claims 1, 3, 6, 8–10, 12–16, 19, 22, 23, 25; grounds included anticipation by Avrahami (claims 1, 10) and obviousness over Avrahami + Perlant (claim 10). (Patexia summary; CourtListener; Justia)
• IPR2017-00034 (second Xactware petition; institution denied 2017-04-13) — challenged claims 1, 8, 10 over Avrahami, Avrahami + McKeown, McKeown, McKeown + Perlant, Hsieh, Hsieh + Perlant, Avrahami + Perlant. (DocketAlarm copy of the Institution Decision)
• Xactware Solutions, Inc. v. Eagle View Technologies, Inc., Nos. 2018-1053, -1055, -1056, -1110 (Fed. Cir. Mar. 6, 2019) — affirmed the Board's validity findings for the '152 patent. (CourtListener; Justia PDF)
• The earlier EagleView applications cited on the face of the family (US20080262789A1, US20090132436A1) are also §102/§103 prior art relative to the 2008 priority date.

I have not been given the actual claim text of the '152 patent, and I could not retrieve full bibliographic data for the "McKeown," "Perlant," and "Hsieh" references before hitting my search limit. I flag those gaps explicitly rather than fabricating citations.

1. The claimed invention (as characterized in the record)

The '152 patent is titled "Concurrent display systems and methods for aerial roof estimation." Based on the specification supplied and the IPR record, the inventive core is a semi-automatic, interactive user interface in which:

1. A first and a second aerial image of a building roof, providing different views, are displayed;
2. The operator indicates a roof feature (edge, corner, planar section) in the first image via a drawing tool/marker;
3. The system modifies a 3D model of the roof (wireframe) based on the indication, using a registration between the image and a shared 3D reference grid; and
4. The system concurrently displays a projection of the feature onto both the first and second images, giving the operator immediate visual feedback on model accuracy and registration quality (FIGS. 6A–6C and 11 of the specification).

Claims 1, 8, and 10 were the "concurrent display"-type claims targeted by Xactware (claims 10, 15, and 25 were the focus of the CAFC appeal), consistent with the title and the "Cited By"/family record.

2. Principal prior art and what each reference supplies

3. Obviousness combinations a PHOSITA would most plausibly assert (and the motivations)

Under pre-AIA §103 (Graham framework), the strongest combinations against the "concurrent display" claims are those Xactware actually advanced, plus combinations with EagleView's own earlier publications. For each, the motivation to combine is the standard one: the references sit in the same technical field (photogrammetric roof/building reconstruction from aerial imagery), address the same problem (producing an accurate 3D roof model), and are complementary rather than conflicting.

Combination A — Avrahami (3D roof-polygon extraction) + Perlant (planar-face 3D reconstruction) → claim 10

• What each contributes: Avrahami provides automatic extraction of 3D spatial polygons representing roof faces from overlapping aerial imagery; Perlant provides the mathematical/geometric machinery for reconstructing planar building/roof faces from multiple aerial views (constraint-based polyhedral fitting).
• Motivation: A PHOSITA building a roof-estimation tool in 2008 would look to Avrahami for roof-specific polygon extraction and to Perlant for the planar-face reconstruction constraints needed to lift 2D extractions into an accurate 3D model. Both are cited together in the photogrammetry literature on building reconstruction; combining them requires only known techniques with a reasonable expectation of success.
• Why it still may fail (per the record): Neither reference discloses the operator-driven loop — user indicates a feature in one view while a projection appears simultaneously in a second registered view. Avrahami is an automatic extraction paper; Perlant supplies reconstruction math, not an interactive multi-view UI feedback mechanism. That was the basis for the Board's validity finding and CAFC affirmance.

Combination B — McKeown (multi-image building extraction/registration) + Perlant → claim 10

• What each contributes: McKeown-type work teaches working from multiple registered aerial images to extract and reconstruct building structures (database/cartographic integration); Perlant again contributes planar-face 3D fitting.
• Motivation: To display a roof feature in one image as a geometrically consistent overlay in another, the images must be co-registered to a common 3D grid — exactly the multi-image registration problem addressed in McKeown's line of work. A PHOSITA would combine McKeown's registered multi-image framework with Perlant's planar-face reconstruction to obtain the 3D model that underlies the projected wireframe. The "concurrent display" itself would be characterized as a routine operator-feedback/visualization step.

Combination C — Hsieh (roof-plane identification/reconstruction) + Perlant → claims 1/8/10

• What each contributes: Hsieh-type work identifies roof planes/features from aerial imagery; Perlant supplies the 3D planar reconstruction. Used against the same claims, the argument is that once roof planes are automatically identified (Hsieh) and reconstructed in 3D (Perlant/Avrahami/McKeown), projecting the resulting wireframe onto the source images for operator verification is an obvious visualization convenience.
• Motivation: Standard photogrammetric practice superimposes extracted vectors/lines on the source imagery for QA/editing; nothing inventive would be seen in doing so across two registered views of the same scene. This is the crux of the obviousness theory, and the Board found it insufficient — largely because the asserted references do not disclose the interactive, real-time, cross-view concurrent projection of an operator-drawn feature, which is the claimed improvement.

Combination D — Avrahami + McKeown → claim 8 (and with the Pershing 2007 applications for the UI/report features)

• If claim 8 (or dependent claims) recites features relating to generating/reporting measurements from the wireframe model, the strongest cumulative case would add US20080262789A1 / US20090132436A1 (same inventor, earlier filed) which already disclose the full aerial-roof-estimation workflow: display of multiple aerial images, manual tracing of roof features, determination of pitch/edge/area, and annotated line-drawing reports. A PHOSITA would combine the automatic 3D extraction of Avrahami/McKeown with the already-known interactive tracing-and-reporting UI of Pershing's earlier applications — the "concurrent display across registered views" being presented as an obvious implementation detail of a well-known operator-feedback paradigm (trace in one view, see the result snapped into the model and re-projected elsewhere).

Generic motivation language (applicable to all combinations)

• Same field of endeavor: aerial/building photogrammetry, computer vision, and roof measurement.
• Known problem: automatic and semi-automatic roof reconstruction is error-prone; operators must verify model geometry against imagery.
• Known solution in the art: vector/wireframe overlay on source imagery for editing and QA — a routine technique in photogrammetric workstations of the 1990s–2000s.
• Reasonable expectation of success: combining a 3D reconstruction reference with a UI/display reference requires no new technology; standard software engineering.

4. Important reality check: the adjudicated record rejected these combinations

You should weigh the following heavily if this analysis is for an invalidity contention:

1. IPR2016-00591 (Final Written Decision, Aug. 14, 2017): the Board upheld the challenged claims of the '152 patent, including claim 1 (instituted as allegedly anticipated by Avrahami) and claim 10 (instituted as obvious over Avrahami + Perlant).
2. IPR2017-00034 (Institution Decision, Apr. 13, 2017): institution was denied for the second petition on claims 1, 8, and 10 over Avrahami/McKeown/Hsieh/Perlant combinations.
3. CAFC (Mar. 6, 2019): affirmed, finding no reversible error in the Board's treatment of claims 10, 15, and 25 of the '152 patent, and agreeing that Avrahami does not disclose the interactive "moving"/"movement" editing limitations.
4. Secondary considerations: the Board credited EagleView's nexus evidence (commercial success/industry praise, including Verisk CEO statements that EagleView's product was an industry leader), which weighed against obviousness.
5. The Pictometry user guide (Xactware's most on-point UI evidence) was excluded as not publicly accessible — a reminder that a §103 case here rises or falls on the public accessibility and disclosure content of the asserted references.

Bottom line: A §103 challenge would most plausibly be built from Avrahami, McKeown, Hsieh, and Perlant, alone or layered with EagleView's own 2007 publications (US20080262789A1 / US20090132436A1) for the tracing/UI/report features. The motivation-to-combine story is straightforward and field-conventional. However, on the record actually litigated, the PTAB and the Federal Circuit found those combinations insufficient, primarily because the references lack the claimed interactive concurrent cross-view display of operator-specified features — the very feature the '152 patent's title and specification emphasize. Any serious obviousness analysis must therefore either (a) rely on a reference with the interactive multi-view UI (e.g., a properly authenticated and publicly accessible software manual predating 2008), or (b) argue that a generic multi-view overlay is implicit in standard photogrammetric workstations — an argument that has already failed twice in this proceeding.

Confidence and gaps

• High confidence: the IPR numbers, parties, dates, claims challenged, and the identities of Avrahami (full citation confirmed via CAFC opinion), McKeown, Perlant, and Hsieh as asserted grounds; the CAFC affirmance; the institution-denial outcome of IPR2017-00034; the non-accessibility finding for the Pictometry manual.
• Not verified: the full bibliographic identities of "McKeown," "Perlant," and "Hsieh" (I could not fetch complete citations before the search limit), and the exact wording of claims 1–25 of the '152 patent (the supplied text truncates before the claims). I recommend pulling the FWD of IPR2016-00591 and the IPR2017-00034 Institution Decision from DocketAlarm/USPTO to obtain both before finalizing any claim-by-claim chart.