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
You got a patent demand letter. Now what?
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 as instructed, then cross-check against the authoritative full text provided. Let me run additional targeted searches for litigation and CAFC activity. Let me try to retrieve the actual claim…
View full analysis →added 9/30/2026Here is a concise summary of US Patent 6,085,318: Title: Computer system capable of booting from CD-ROM and tape Assignee: Hewlett Packard Development Co LP (Current Assignee) Inventors: Kerry B. Vander Kamp, Roberta W. Hensley, Curtis R…
View full analysis →added 7/4/2026I'll check live sources for this specific patent number before summarizing. US Patent 6,110,426 — Analyst Summary Confidence note up front: The retrieval I have for this patent (Google Patents full text, fetched 2026‑09‑08, plus…
View full analysis →added 9/8/2026I'll search for the patent's litigation and docket records, then summarize. Summary — U.S. Patent No. 6,137,502 Bibliographic data (from the patent's front-page/Google Patents record) | Field | Value | |---|---| | Patent number | US…
View full analysis →added 9/30/2026I'll search for the specific patent number in USPTO and CAFC 2026 dockets. Let me verify whether there's any 2026 appellate or litigation activity involving this specific patent. US Patent 6,172,955 — Summary Caveat on the "CAFC 2026…
View full analysis →added 9/28/2026I'll search for the specific patent number and any CAFC 2026 docket activity. Let me try alternative search formulations. Let me check specifically for CAFC 2026 docket activity and any current litigation. Summary — U.S. Patent No…
View full analysis →added 9/9/2026I'll search for authoritative information on US patent 6189537, including any CAFC 2026 litigation activity. Let me search for the specific claims text and any 2026 appellate activity. Let me retrieve the full claim set for accuracy. US…
View full analysis →added 9/26/2026I'll search for authoritative information on US 6198920 and any 2026 CAFC activity. Let me verify claim structure and any 2026 litigation/docket activity. Let me try to confirm the exact independent claim language and check docket sources…
View full analysis →added 9/27/2026I'll search for authoritative information on US 6215559, including any 2026 CAFC docket activity. Let me check the litigation history and any 2026 appellate docket activity. Let me check the New York Western District case and any…
View full analysis →added 9/29/2026I'll ground this in the authoritative patent text provided, and run targeted searches for the litigation/docket angle you asked about. Let me try to pull the actual claim language, since the provided full text is truncated before the…
View full analysis →added 9/24/2026I'll search for authoritative information on US 6286050, including any 2026 CAFC docket activity. Let me check for any litigation or post-grant proceedings specifically involving this patent. US Patent 6,286,050 — Verification Summary…
View full analysis →added 9/27/2026I'll search for this specific patent number across USPTO and litigation sources. Let me search for the specific claims of US6304216 and any litigation/CAFC docket activity. Let me retrieve the full claim set to identify the independent…
View full analysis →added 9/29/2026I'll search for authoritative information on this patent and any 2026 CAFC activity. Let me run a few more targeted checks on the patent's USPTO status and any litigation/docket activity. US Patent 6,314,081 — Analyst Summary Bottom line…
View full analysis →added 9/30/2026I'll search for this specific patent and any related litigation. US 6,318,994 B1 — "Tooth path treatment plan" Note on sources/dates. I ran live web searches (Google Patents, FreePatentsOnline, uspto.report, CAFC opinion PDFs) rather than…
View full analysis →added 9/29/2026I'll verify this patent against live sources before summarizing. Let me pull the claim text and check for litigation. Search note / scope limitations I ran web searches against Google Patents (the authoritative full text you supplied)…
View full analysis →added 9/24/2026I'll search for this specific patent number and check for any 2026 litigation activity. Let me check specifically for litigation and Federal Circuit docket activity. US Patent 6,337,858 (rendered "6337858") — Summary Scope note on method…
View full analysis →added 9/28/2026I'll research US patent 6,355,432 across the specified sources. Let me verify the claim set and check for any Federal Circuit / 2026 activity. Research Summary — US 6,355,432 (literal ID: "6355432") Confidence note up front: I found no…
View full analysis →added 9/11/2026I'll verify the bibliographic data and try to pull the actual claim set (the patent text I was given contains the description but not the numbered claims). I have claim 1 verbatim. Let me try to pull the full independent-claim set to…
View full analysis →added 9/26/2026I'll search for this specific patent number across the requested sources. Now let me check for litigation and CAFC 2026 docket activity. Let me search for any 2026 appellate activity. US Patent 6,394,801 — Summary No 2026 Federal Circuit…
View full analysis →added 9/29/2026I'll search for authoritative information on this patent number. US 6,399,365 B2 — Analyst Summary Search notes up front: My searches returned solid bibliographic and claim-family data for 6,399,365 specifically (Google Patents…
View full analysis →added 9/11/2026