The catalog
Patent invalidity dossiers.
7,244 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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- US110467420 cases6/8 sections
I'll search for this patent and any related 2026 CAFC docket activity. Let me try additional targeted searches. Let me check for any 2026 litigation or Federal Circuit activity involving this patent or its owner. US Patent 11,046,742 B2 —…
View full analysis →added 9/11/2026 - US110476490 cases6/8 sections
I'll search for litigation and docket information on this specific patent number. Let me run additional targeted searches on litigation and docket activity. Patent Summary — US 11,047,649 B2 Note on scope of my search: I ran multiple…
View full analysis →added 9/24/2026 - US110476520 cases6/8 sections
I'll verify the patent record and check for any litigation activity, then summarize. Let me check for litigation and assignment/ownership details. US 11,047,652 B2 — Verification and Summary Search scope note: I ran targeted queries…
View full analysis →added 9/24/2026 - US110536960 cases6/8 sections
I'll run targeted searches for this specific patent number, then compile the summary from the authoritative patent text. Search results for US 11,053,696 — USPTO / CAFC 2026 dockets No new litigation, PTAB, or CAFC 2026 appellate activity…
View full analysis →added 7/13/2026 - US110542390 cases6/8 sections
I'll search for authoritative information on this patent number, including any 2026 litigation activity. Let me run targeted searches for any litigation or PTAB activity involving this specific patent. US Patent 11,054,239 — Summary…
View full analysis →added 9/24/2026 - US110542420 cases6/8 sections
I'll search for authoritative information on this patent, including any litigation activity. Let me run additional targeted searches to check for any litigation or PTAB activity on this specific patent. Summary — US 11,054,242 B2 Caveat on…
View full analysis →added 9/24/2026 - US110542430 cases6/8 sections
I'll search for authoritative information on this patent number, including any CAFC litigation activity. US 11,054,243 B2 — Verification Summary Search scope note: I ran the USPTO/Google Patents full text, Justia, the Texas A&M…
View full analysis →added 9/22/2026 - US110542440 cases6/8 sections
I'll search for authoritative information on this specific patent number and any CAFC 2026 docket activity. Let me check for any CAFC (Federal Circuit) 2026 docket activity and litigation involving this patent. US Patent 11,054,244 B2 —…
View full analysis →added 9/24/2026 - US110594590 cases6/8 sections
I'll search for authoritative information on this patent number, including any litigation activity. Let me search specifically for litigation/docket records and USPTO records for this patent. Let me run a couple of final targeted checks…
View full analysis →added 9/24/2026 - US110608670 cases6/8 sections
I'll run targeted searches for this exact patent number, including any 2026 CAFC docket activity. Let me check specifically for litigation/docket activity involving this patent. US 11,060,867 B2 — rotation rate sensor Search scope note…
View full analysis →added 9/24/2026 - US110608700 cases6/8 sections
I'll search for litigation and docket information on this specific patent, then summarize. Let me check for any PTAB/IPR or district court litigation, and verify against the USPTO record. I have the claim set from the granted patent. Let…
View full analysis →added 9/24/2026 - US110608720 cases6/8 sections
I'll search for this specific patent number as requested. Search Results for US Patent No. 11060872 Searches performed (USPTO / CAFC 2026 dockets): I ran two targeted queries — one for the patent number itself, and one pairing the number…
View full analysis →added 9/24/2026 - US110608730 cases6/8 sections
I'll verify the patent details against live sources and check for any litigation/docket activity. US 11,060,873 B2 — Verification & Summary Search scope / caveats first: Live searches of Google Patents, Espacenet, and FreePatentsOnline…
View full analysis →added 9/24/2026 - US110674840 cases6/8 sections
I'll search for this specific patent number and check for any litigation activity. The second search returned some noise (a Japanese application JP11067484A, which is unrelated). Let me check specifically for litigation and CAFC activity…
View full analysis →added 9/24/2026 - US110674850 cases6/8 sections
I'll search for the specific patent number and check for any litigation activity. Summary: US 11,067,485 B2 Searches performed: Google Patents (full text, authoritative copy provided), Justia Patents, EPO publication server, and open-web…
View full analysis →added 9/24/2026 - US110674870 cases6/8 sections
Patent Overview — US 11067487 B2 Title: "Apparatus, system, and method for collecting a target material" Patent number / application: US11067487B2; application US15/401,054; earlier publication US20170191911A1; later publication…
View full analysis →added 9/24/2026 - US110674900 cases6/8 sections
I'll search for this specific patent number across the requested sources. Let me verify the litigation/docket angle and confirm the patent's family and current assignment. Let me run additional targeted checks on litigation/post-grant…
View full analysis →added 9/24/2026 - US110734990 cases6/8 sections
I'll run targeted searches for this patent number, including any 2026 CAFC activity. Let me check for any litigation or CAFC activity involving this patent and confirm the claim set. Search note / methodology I could not directly query…
View full analysis →added 9/24/2026 - US110770790 cases6/8 sections
I'll search for authoritative information on this specific patent number. Let me verify the actual claims and check for any Court of Appeals for the Federal Circuit (CAFC) docket activity. Let me check the Federal Circuit appeal outcome…
View full analysis →added 10/1/2026 - US110803780 cases6/8 sections
I'll research this patent across USPTO/public patent databases and litigation dockets. Let me get the actual claim text and check for any 2026 litigation/appeal involving this specific patent. Let me pin down the actual claim text of this…
View full analysis →added 9/24/2026