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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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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  • US6367694
    0 cases6/8 sections

    I'll search for information on this patent, including any 2026 CAFC activity. Let me search specifically for litigation or CAFC docket activity involving this patent. Summary — US Patent 6,367,694 Important caveat up front: I found no…

    View full analysis →added 9/24/2026
  • US6368198
    0 cases6/8 sections

    Search-scope note I ran targeted web searches against Google Patents/Justia (USPTO full-text mirrors), the ITC and district-court documents that surfaced, and general CAFC 2026 opinion coverage. I found no CAFC 2026 docket, appeal, or PTAB…

    View full analysis →added 9/24/2026
  • US6370135
    0 cases6/8 sections

    I'll verify the patent's bibliographic data and check for any 2026 litigation, then summarize. The CAFC search returned nothing. Let me run a couple of targeted follow-ups on litigation/docket history. US Patent 6,370,135 — Analyst Summary…

    View full analysis →added 9/9/2026
  • US6374456
    0 cases6/8 sections

    I'll run the requested searches, then summarize against the authoritative patent text provided. Let me check specifically for litigation and for the CAFC docket angle. Summary — US Patent 6,374,456 (searched literally as "6374456")…

    View full analysis →added 9/24/2026
  • US6378512
    0 cases6/8 sections

    I'll search for authoritative information on this patent number, including litigation/docket activity. Let me check the patent's dedicated pages and any litigation records. Let me run a few additional targeted searches to check for any…

    View full analysis →added 9/24/2026
  • US6379058
    0 cases6/8 sections

    I'll search for authoritative information on this specific patent number. Let me check for litigation and Federal Circuit activity involving this specific patent. Let me do a few more targeted searches for appellate and PTAB activity. US…

    View full analysis →added 9/24/2026
  • US6383668
    0 cases6/8 sections

    I'll verify against live sources, then summarize. Search results and scope note I searched for US 6,383,668 and for CAFC 2026 docket activity tied to that number. I found no CAFC 2026 appeal, PTAB proceeding, or district-court litigation…

    View full analysis →added 9/24/2026
  • US6385535
    0 cases6/8 sections

    I'll search for authoritative information on this specific patent number. US Patent 6,385,535 — Summary Verification note: My searches surfaced this patent only through secondary aggregators (Google Patents, uspto.report, Justia…

    View full analysis →added 9/24/2026
  • US6386980
    0 cases6/8 sections

    I'll search for this patent in the USPTO database and any CAFC 2026 docket records. Let me run additional targeted searches for any CAFC or litigation records involving this specific patent. One more check for CAFC records and confirmation…

    View full analysis →added 8/27/2026
  • US6387918
    0 cases6/8 sections

    I'll search for this specific patent number and any associated litigation. US Patent 6,387,918 — Analyst Summary Note on methodology / scope: I searched for the number "6387918" and related terms. I do not have direct API access to USPTO…

    View full analysis →added 9/24/2026
  • US6388579
    0 cases6/8 sections

    I'll search for authoritative sources on this patent number, including any litigation or CAFC docket activity. Let me check for any litigation, PTAB, or CAFC records specifically involving this patent. US Patent 6,388,579 — Analyst Summary…

    View full analysis →added 9/26/2026
  • US6395219
    0 cases6/8 sections

    I'll search for the specific patent number and any related litigation. Let me search for litigation and enforcement activity specific to this patent. Let me check for any appellate activity and verify the patent's current status. US…

    View full analysis →added 9/29/2026
  • US6402613
    0 cases6/8 sections

    I'll verify the patent details and check for any litigation/docket activity before summarizing. Let me check for any litigation or assignment chain activity involving the patent's owners. US 6,402,613 B1 — Verification and Summary Note on…

    View full analysis →added 9/28/2026
  • US6404811
    0 cases6/8 sections

    I'll run searches for this specific patent number and check for any litigation. US 6,404,811 (Patent No. 6404811) — Summary Important scoping note: I searched for this exact number 6404811. I found no CAFC 2026 docket, appeal, or Federal…

    View full analysis →added 9/24/2026
  • US6405047
    0 cases6/8 sections

    I'll search for litigation and docket information on this patent number, then provide the summary. Let me run a couple more targeted searches to check for any 2026 proceedings. Search results for US 6,405,047 Litigation / CAFC 2026 docket…

    View full analysis →added 9/29/2026
  • US6406474
    0 cases6/8 sections

    I'll search for authoritative information on this patent number. Let me check for litigation and USPTO records specifically. Let me confirm the litigation/appeal status with a couple more targeted searches. Search results for the exact…

    View full analysis →added 9/24/2026
  • US6406845
    0 cases6/8 sections

    I'll search for the specific patent number and any litigation related to it. Let me dig into litigation history and the actual claim set. US 6,406,845 — Verification Summary Search-status caveat up front: I searched general web/patent…

    View full analysis →added 9/8/2026
  • US6409602
    0 cases6/8 sections

    US Patent 6,409,602: Slim Terminal Gaming System Title: Slim terminal gaming system Assignee: New Millenium Gaming LLC Inventors: Michael S. Wiltshire, James J. Lisenbee, Jayant S. Karmarkar, Timothy A. Wiltshire Filing Date: November 24…

    View full analysis →added 7/14/2026
  • US6410231
    0 cases6/8 sections

    I'll search for this patent number and any 2026 CAFC docket activity. Let me check for litigation/docket activity and confirm the full claim set. US Patent 6,410,231 — Summary Bottom line up front: I confirmed the bibliographic data from…

    View full analysis →added 9/26/2026
  • US6412611
    0 cases6/8 sections

    I'll search for this specific patent number and any associated litigation or docket activity. Let me run a couple more targeted searches on litigation/docket activity and assignee history. US Patent 6,412,611 B1 — Analyst Summary Data…

    View full analysis →added 9/24/2026