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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- US85721820 cases6/8 sections
I'll search for authoritative information on US 8572182, including any 2026 litigation activity. Let me search for more specific litigation history and any 2026 activity. Let me check for any 2026 Federal Circuit activity and the…
View full analysis →added 9/28/2026 - US8572740 cases6/8 sections
I'll search for this specific patent number literally, as instructed. Summary — US Patent 857,274 Important framing note (literal reading): The identifier given is 857274 — a six‑digit U.S. patent number granted in 1907. It is not the…
View full analysis →added 9/24/2026 - US85775190 cases6/8 sections
I'll research US Patent 8,577,519 by searching authoritative sources. Let me check for any CAFC litigation or USPTO records involving this specific patent number. Let me run additional targeted searches to confirm no litigation and verify…
View full analysis →added 9/3/2026 - US85831950 cases6/8 sections
I'll search for authoritative information on this patent. Let me run several queries in parallel. Let me run additional targeted checks for litigation, PTAB, and assignment records specific to this number. US 8,583,195 B2 — Verification…
View full analysis →added 9/22/2026 - US85867130 cases6/8 sections
I'll search for authoritative information on US 8586713, including any 2026 CAFC docket activity. Let me run a few more targeted searches to confirm whether 8586713 appears in any 2026 litigation or CAFC docket. Let me try to retrieve the…
View full analysis →added 9/20/2026 - US85939710 cases6/8 sections
I'll search for authoritative information on this patent number, including any litigation or CAFC docket references. Let me do additional targeted checks for any litigation or CAFC activity tied specifically to this patent number. US…
View full analysis →added 9/28/2026 - US85981210 cases6/8 sections
I'll search for information on US patent 8598121, including litigation activity. Let me search for the claim text and any litigation involving this patent. Let me retrieve the full claim set for US8598121. US Patent 8,598,121 — Analyst…
View full analysis →added 9/29/2026 - US86119200 cases6/8 sections
I'll search for authoritative information on US 8611920, including any litigation or CAFC docket activity. Let me check specifically for any litigation or Federal Circuit activity involving this patent. Let me check the IpVenture v. FedEx…
View full analysis →added 9/29/2026 - US86130830 cases6/8 sections
I'll ground this on the authoritative patent text provided, and check for any litigation/docket activity. I have the patent text but it is truncated before the claims section. Let me try to retrieve the actual claim language. US 8,613,083…
View full analysis →added 9/26/2026 - US86158150 cases6/8 sections
I'll run the requested searches first, then summarize against the authoritative full text I already have. Let me run a few more targeted checks on litigation/docket history and the inventor name discrepancy. Search-execution note…
View full analysis →added 9/28/2026 - US86227480 cases6/8 sections
I'll search for information on US Patent 8622748, including any CAFC 2026 docket references. Let me do a couple more targeted searches to check for any USPTO record details and any CAFC or litigation activity involving this patent. Let me…
View full analysis →added 8/26/2026 - US86300000 cases6/8 sections
I'll search for authoritative information on this patent number and any 2026 CAFC activity. Let me check for litigation/docket activity and the independent claim set. US Patent 8,630,000 — Summary Sourcing note: The patent text supplied in…
View full analysis →added 8/29/2026 - US86306120 cases6/8 sections
I'll search for authoritative information on this patent, including any 2026 CAFC docket activity. Let me search for the actual claim text and any litigation record. Let me search for the specific claim language and any 2026 Federal…
View full analysis →added 9/30/2026 - US86309170 cases6/8 sections
I'll search for this patent in the requested sources. Let me check the CAFC 2026 dockets and litigation history. Let me run a couple more targeted checks on litigation/appeal history and PTAB records. US Patent 8,630,917 — Analyst Summary…
View full analysis →added 9/24/2026 - US86348000 cases6/8 sections
I'll search for the patent record, its granted claims, and any 2026 CAFC docket activity. Let me pull the granted claim text and check specifically for any 2026 CAFC docket activity involving this patent or Tango Networks. US Patent…
View full analysis →added 9/3/2026 - US86348880 cases6/8 sections
I'll query the sources available to me for this specific patent number and its CAFC 2026 docket status. Let me pull the granted claim set and check the CAFC 2026 docket for this patent number. Let me try to retrieve the full granted claim…
View full analysis →added 9/22/2026 - US86353140 cases6/8 sections
I'll search the USPTO and CAFC sources for the specific patent number 8635314. Search Results I searched for patent number 8635314 (and its publication number US8635314B2) specifically. I found authoritative records on Google Patents and…
View full analysis →added 8/27/2026 - US86383400 cases6/8 sections
I'll search for authoritative information on US 8638340, including any 2026 CAFC docket activity. Now let me check for any CAFC 2026 appellate docket activity and the USPTO litigation/PTAB record for this specific patent. Let me get the…
View full analysis →added 9/27/2026 - US86396340 cases6/8 sections
I'll search for authoritative information about this patent, including any litigation or CAFC docket activity. Let me check for litigation/docket activity and verify the claim set. Let me verify the full independent claim set and confirm…
View full analysis →added 9/24/2026 - US86401650 cases6/8 sections
I'll verify this against live sources, including USPTO records and any 2026 CAFC docket activity. Let me check for any CAFC activity and pull the claim set. Let me look for the specific claims and any litigation/appeal involving this…
View full analysis →added 9/29/2026