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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- US6606750 cases6/8 sections
I'll search for this specific patent number as requested. Scope and search notes (read first) Two of the requested steps could not be completed as literally stated, and I want to be explicit about that rather than fill the gap: - No USPTO…
View full analysis →added 9/24/2026 - US66073140 cases6/8 sections
I'll search for this specific patent number and any associated litigation. Let me search for USPTO records and any CAFC/litigation history. US Patent 6,607,314 — Analyst Summary Search scope note: I searched for the literal number 6607314…
View full analysis →added 9/29/2026 - US66077840 cases6/8 sections
I'll search for the specific patent number and any associated litigation. Let me run a few more targeted searches to check for litigation or Federal Circuit activity. Let me look specifically for the claim text and any litigation involving…
View full analysis →added 9/30/2026 - US66106010 cases6/8 sections
I'll search for authoritative information on US patent 6610601. US Patent 6,610,601 — Search Results Sources consulted: Google Patents (https://patents.google.com/patent/US6610601/en), FreePatentsOnline…
View full analysis →added 9/24/2026 - US66115090 cases6/8 sections
I'll verify the litigation/assignment posture with targeted searches, then summarize. Let me try to pull the exact claim language, since the fetched text omitted the claims section. Search scope and what it returned I searched for the…
View full analysis →added 9/24/2026 - US66118750 cases6/8 sections
I'll verify the patent details against live sources and check for any litigation activity. Let me pull the actual claim text, since the provided full text is truncated before the claims. Let me try to retrieve the actual claim language…
View full analysis →added 9/30/2026 - US66129280 cases6/8 sections
I'll run targeted searches for this specific patent number and for any CAFC 2026 activity. Let me check for any litigation or CAFC activity specifically tied to this patent. I have the bibliographic data confirmed. Let me try to retrieve…
View full analysis →added 9/24/2026 - US66131010 cases6/8 sections
I'll search for authoritative information on this patent number. Let me check for any appellate (CAFC) activity and litigation involving this patent. US Patent 6,613,101 — Verified Summary Note on your search request: I ran targeted…
View full analysis →added 9/30/2026 - US66179610 cases6/8 sections
I'll run targeted searches for this specific patent number, including any 2026 CAFC docket activity. US Patent 6,617,961 B1 — Analyst Summary Bibliographic Data (from the patent document) | Field | Value | |---|---| | Patent number | US…
View full analysis →added 9/30/2026 - US66256940 cases6/8 sections
I'll verify the patent against live sources and check for any 2026 CAFC docket activity. Verification complete. Here is the summary. US Patent 6,625,694 (US 6,625,694 B2) — Verified Summary Important identifier note: The number as given…
View full analysis →added 9/24/2026 - US66260720 cases6/8 sections
I'll search for this specific patent number as requested. Let me check for any litigation or CAFC docket activity involving this patent. Let me do one more targeted check for litigation activity involving this patent or its owner. US…
View full analysis →added 9/27/2026 - US66291290 cases6/8 sections
I'll search for authoritative records on this specific patent number, then reconcile with the full text provided. Let me verify whether any litigation or CAFC activity exists for this patent, and check the full claim set (the provided text…
View full analysis →added 9/24/2026 - US66335600 cases6/8 sections
I'll search for the patent and check for any 2026 CAFC docket activity. Let me check for litigation history, PTAB proceedings, and the full claim set. US Patent 6,633,560 — Analyst Summary Scope note up front: I ran searches against Google…
View full analysis →added 9/30/2026 - US66335640 cases6/8 sections
I'll search for authoritative information on this patent. Let me check for any litigation or PTAB activity specifically involving this patent number. US Patent 6,633,564 — Analyst Summary Bibliographic data (authoritative bibliographic —…
View full analysis →added 9/27/2026 - US66347700 cases6/8 sections
Here's a concise summary of US patent 6634770: US Patent 6634770: Light source using semiconductor devices mounted on a heat sink Title: Light source using semiconductor devices mounted on a heat sink Current Assignee: Cao Lighting Inc…
View full analysis →added 6/15/2026 - US66361780 cases6/8 sections
I'll research US patent 6636178 across the requested sources. Let me search for litigation/docket information and the full claim set. Let me check for specific CAFC dockets and litigation history involving this patent. US Patent 6,636,178…
View full analysis →added 9/29/2026 - US66436500 cases6/8 sections
I'll search for this patent across the sources you specified. I have the patent's core bibliographic and claim data. Now let me check for litigation/PTAB and CAFC 2026 docket activity for this exact number. Report — US Patent 6,643,650…
View full analysis →added 9/29/2026 - US66508750 cases6/8 sections
I'll search for litigation and docket information on this specific patent number before summarizing. Let me do one more targeted check for any litigation or PTAB proceeding naming this patent. Search result: no litigation/docket activity…
View full analysis →added 9/20/2026 - US66530980 cases6/8 sections
I'll search for authoritative information on this patent number and any related litigation. Let me run a couple more targeted searches to check specifically for litigation or CAFC docket activity involving this patent. US Patent 6,653,098…
View full analysis →added 9/24/2026 - US66541350 cases6/8 sections
I'll search for this specific patent number across patent databases and court dockets. Initial searches returned unrelated documents. Let me target the patent more precisely and check court dockets. Now let me check for any litigation or…
View full analysis →added 9/24/2026