The catalog
Patent invalidity dossiers.
7,175 patents in the database, sorted by number of on-file litigation cases. Of these, 2,988 have at least one tracked case across 6,606 litigations.
Demand letter analyzer
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Paste the letter — we extract the asserted patents, identify the asserter, characterize their litigation history, flag validity vulnerabilities, and draft a sample response letter your attorney can review. Free, private, ~2-3 minutes.
Analyze a patent
Drop a US patent number — we’ll verify it on Google Patents and generate the full invalidity dossier.
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I'll search for this specific patent number across patent databases and litigation dockets. Let me pull the actual claim text and check the CAFC/litigation dockets. The claim text returned in that last result belongs to a different patent…
View full analysis →added 9/27/2026I'll verify the patent details and check for litigation/docket information. I have the bibliographic data and litigation info. Now let me try to retrieve the actual claim text, since the provided full-text excerpt did not include the…
View full analysis →added 9/27/2026I'll search for authoritative records on this specific patent. Let me check the litigation history and any 2026 appellate activity specifically for this patent. USPTO / CAFC search results for US 6,463,413 I searched for this exact patent…
View full analysis →added 9/25/2026Here is a concise summary of US patent 6465961: US Patent 6465961: Semiconductor Light Source Using a Heat Sink with a Plurality of Panels Title: Semiconductor light source using a heat sink with a plurality of panels Assignee: Cao…
View full analysis →added 6/15/2026Summary of U.S. Patent 6,470,007 (US6470007B1) Search note / methodology: I searched for the literal identifiers "6470007," "US6470007," and "6,470,007." Results returned only the correct patent (plus its family members and citing…
View full analysis →added 9/9/2026I'll verify the patent details against live sources before summarizing. US Patent 6,484,199 — Analyst Summary Scope note: The following is based on the full patent text supplied for US 6,484,199 B2 plus live lookups of the Official Gazette…
View full analysis →added 9/28/2026US Patent 6,487,616 — "Controller for data recorder" Sources consulted: Google Patents (US6487616B1), USPTO-derived gazette text (Indiana VDL, Issue 1264‑4), Justia Patents, Stanford NPE Litigation Database, MediaTek quarterly…
View full analysis →added 9/28/2026I'll search for authoritative information on this specific patent number. Let me search for the full claim set and any recent (2026) litigation activity. US Patent 6,519,648 — Analyst Summary Scope note / sourcing: I was able to retrieve…
View full analysis →added 9/28/2026I'll search for this specific patent number and any related 2026 litigation activity. Let me refine the searches for this specific patent's litigation history. Let me check for any 2026 appellate activity and litigation records involving…
View full analysis →added 9/29/2026I'll search for authoritative information on US 6560534. Let me search for litigation and any 2026 CAFC activity. US Patent 6,560,534 — Summary Note on searches performed: I searched Google Patents, uspto.report, Justia/RPX, and general…
View full analysis →added 9/24/2026I'll verify the patent's bibliographic data and check for any 2026 Federal Circuit activity. Let me run a couple more targeted checks on the patent's current record and any 2026 appellate activity. US Patent 6,575,563 — Verified…
View full analysis →added 9/3/2026I'll search for authoritative information on US 6576424, including any 2026 CAFC activity. Let me get the abstract and claim language, and check specifically for any 2026 Federal Circuit activity. Let me try to pull the actual abstract and…
View full analysis →added 9/27/2026- US6581042B21 case →6/8 sections
I'll verify the patent identifiers and check for any litigation/docket records before summarizing. Now let me check for litigation history and to retrieve the actual claim text, since the provided full text was truncated before the claims…
View full analysis →added 9/27/2026 I'll verify the patent details against live sources before summarizing. US Patent 6,594,213 B1 — Verification Summary Source check: I searched for the exact number 6594213 (and 6,594,213). Live results (FreePatentsOnline, Google Patents…
View full analysis →added 9/28/2026I'll search for this specific patent's litigation and docket status before summarizing. Let me search more specifically for any CAFC appeals or 2026 activity. Let me verify the post-reexamination claim set and check for any 2026 appellate…
View full analysis →added 9/29/2026I'll search the USPTO/patent databases and Federal Circuit 2026 dockets for this specific patent number. Let me dig into the patent's claims and abstract, and do a more targeted Federal Circuit docket check. Let me try to retrieve the…
View full analysis →added 9/11/2026I'll search for current information on this specific patent number. Let me try more targeted searches for litigation and docket records. US Patent 6,629,077 B1 — Analyst Summary Note on the ID: I interpreted the identifier literally as…
View full analysis →added 9/28/2026I'll search for authoritative information on US 6,638,313, including any current litigation status. Let me check for any recent (2026) litigation or Federal Circuit activity, and the reexamination outcome. Let me verify the reexamination…
View full analysis →added 9/30/2026Here is a concise summary of US patent 6640248: US Patent 6640248 Summary Title: Application-aware, quality of service (QoS) sensitive, media access control (MAC) layer Original Assignee: Malibu Networks Inc Current Assignee: Dow Chemical…
View full analysis →added 5/10/2026I'll search for the specific patent number and any related litigation/docket information. Let me check specifically for any recent (2026) CAFC activity and confirm current ownership status. US Patent 6,651,000 — Analyst Summary Note on the…
View full analysis →added 9/29/2026