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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  • US6848347
    0 cases6/8 sections

    I'll search for this specific patent number and check for any litigation or CAFC docket activity. Let me run additional targeted searches for any legal proceedings involving this patent. Let me check for any post-grant proceedings…

    View full analysis →added 9/24/2026
  • US6850527
    0 cases6/8 sections

    I'll search for authoritative information on this patent number, including any litigation activity. Let me run one more targeted search for litigation/docket activity specific to this patent. Search results note I could not retrieve any…

    View full analysis →added 9/23/2026
  • US6850557
    0 cases6/8 sections

    I'll search for authoritative information on this patent, including any litigation. I have the specification but not the claims text. Let me retrieve the claims and check for any 2026 Federal Circuit activity. US 6,850,557 B1 — Analyst…

    View full analysis →added 9/29/2026
  • US6853385
    0 cases6/8 sections

    Here's a concise summary of US patent 6853385: Title: Video, audio and graphics decode, composite and display system Original Assignee: Broadcom Corp Current Assignee: Avago Technologies International Sales Pte Ltd Inventors: Alexander G…

    View full analysis →added 7/15/2026
  • US6853988
    0 cases6/8 sections

    I'll search for authoritative information on US 6853988, including any 2026 CAFC activity. Let me check for any 2026 CAFC activity and litigation/PTAB records. I have solid bibliographic data. Now let me retrieve the actual claim text…

    View full analysis →added 9/28/2026
  • US6857006
    0 cases6/8 sections

    I'll search for information on this specific patent, including any litigation activity. Search scope and caveats I searched for the specific identifier 6857006 / 6,857,006. Two things you should know up front: 1. I did not have direct API…

    View full analysis →added 9/24/2026
  • US6857716
    0 cases6/8 sections

    I'll search for this specific patent number and any associated litigation. Let me check for litigation and verify the USPTO record. Let me do a couple more targeted checks for any 2026 appellate activity and the patent's legal status. US…

    View full analysis →added 9/24/2026
  • US6858222
    0 cases6/8 sections

    Here's a concise summary of US patent 6858222: Title: Fabrication of drug loaded biodegradable polymer fibers Assignee: University of Texas System Inventors: Kevin D Nelson, Andres A. Romero-Sanchez, George M. Smith, Nadir Alikacem, Delia…

    View full analysis →added 7/28/2026
  • US6858881
    0 cases6/8 sections

    I'll search for authoritative information on this patent, including any 2026 litigation activity. Let me verify litigation/Court of Appeals activity with additional searches. US Patent 6,858,881 — Verification Summary Data source note: I…

    View full analysis →added 9/24/2026
  • US6859831
    0 cases6/8 sections

    I'll run targeted searches for this specific patent number and any 2026 CAFC activity. Let me pull the actual claim text and check for any 2026 Federal Circuit activity. Let me get the actual claim language and check that 2026 Federal…

    View full analysis →added 9/20/2026
  • US6867477
    0 cases6/8 sections

    I'll verify against live sources, then summarize. Let me run searches for the patent and any litigation. US 6,867,477 — Verification and Summary Sourcing note / confidence: My checks were run through general web search against Google…

    View full analysis →added 9/26/2026
  • US6869690
    0 cases6/8 sections

    I'll search for authoritative information on this specific patent number and any 2026 litigation activity. US Patent 6,869,690 B1 — Summary Caveat on scope: I have the authoritative full text (Google Patents mirror of the issued patent). I…

    View full analysis →added 9/28/2026
  • US6870477
    0 cases6/8 sections

    I'll run targeted searches for this exact patent number, including any 2026 CAFC docket activity. Let me run a few more targeted checks for litigation/PTAB activity and the official USPTO record. US Patent 6,870,477 — Verification Summary…

    View full analysis →added 9/30/2026
  • US6873975
    0 cases6/8 sections

    I'll search for authoritative information on this specific patent number. Search results: US Patent 6,873,975 Note on scope of search I searched for the literal string "6873975" and combinations with USPTO/CAFC 2026 docket terms. I found…

    View full analysis →added 9/24/2026
  • US6876668
    0 cases6/8 sections

    I'll search for patent 6876668 specifically, including any 2026 litigation activity. Let me check for any litigation/reexamination activity and the exact text of claim 1. Let me verify whether there's any reexamination or court proceeding…

    View full analysis →added 9/24/2026
  • US6882290
    0 cases6/8 sections

    Based on my searches, I have authoritative data from the patent text itself (provided in the request and confirmed via Google Patents and FreePatentsOnline) but found no CAFC 2026 docket entries specific to this patent. My searches for…

    View full analysis →added 9/6/2026
  • US6888400
    0 cases6/8 sections

    I'll verify the patent details against live sources and check for any litigation/docket appearances. Let me check specifically for any litigation or post-grant proceedings involving this patent. US Patent 6,888,400 — Verified Summary…

    View full analysis →added 9/24/2026
  • US688903
    0 cases6/8 sections

    I'll run targeted searches for this patent number, including any litigation or CAFC activity. Let me check for any litigation or CAFC activity, and verify the USPTO record. US Patent 688,903 — Search Report and Summary Scope note: I…

    View full analysis →added 9/26/2026
  • US6894615
    0 cases6/8 sections

    I'll verify the patent identifiers and check for any USPTO/CAFC litigation activity. Let me check specifically for any litigation or CAFC appellate activity. US Patent 6,894,615 B2 — Verification Summary Searches performed: Google Patents…

    View full analysis →added 9/30/2026
  • US6901440
    0 cases6/8 sections

    I'll search for authoritative information on this patent, including any 2026 CAFC docket activity. Let me look for the actual claims text and any 2026 litigation/docket activity. Let me try to retrieve the actual claim text and check for…

    View full analysis →added 9/24/2026