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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- US69067410 cases6/8 sections
I'll search for this specific patent number, including any litigation or CAFC activity. US Patent 6,906,741 — Analyst Summary Search scope note: I searched for the exact number 6906741 across patent databases and…
View full analysis →added 9/27/2026 - US69088010 cases6/8 sections
I'll verify this patent's details and check for any 2026 CAFC docket activity. Let me check specifically for litigation or assignment records involving this exact patent number. Let me pull the full numbered claim set to identify the…
View full analysis →added 9/29/2026 - US69178210 cases6/8 sections
I'll search for this specific patent number across the requested sources. Let me run a few more targeted searches to confirm litigation/appeal status. Summary — US Patent 6,917,821 (rendered literally as "6917821") Note on interpretation…
View full analysis →added 9/28/2026 - US69201250 cases6/8 sections
US patent 6920125, titled "IP adaptation layer on backhaul connection of cellular network," provides a method and system for optimizing the transmission of small, frequently delivered data packets in a cellular network's backhaul…
View full analysis →added 5/10/2026 - US69227280 cases6/8 sections
US Patent 6,922,728 B2 — Summary Bibliographic Data (verified against patent front page and court-filed copies) | Field | Value | |---|---| | Patent No. | US 6,922,728 B2 (US6922728) | | Title | Optimal Internet Network Connecting and…
View full analysis →added 8/31/2026 - US69328420 cases6/8 sections
I'll search for this specific patent number across USPTO and court sources. Let me check for any litigation or CAFC activity specific to this patent. US 6,932,842 — Verification Summary Search scope & confidence note. I ran targeted…
View full analysis →added 9/29/2026 - US69412730 cases6/8 sections
I'll search for current information on this specific patent, including any 2026 CAFC docket activity. Let me check specifically for any 2026 litigation or CAFC docket activity involving this patent or its owner. US Patent 6,941,273 —…
View full analysis →added 9/24/2026 - US69508760 cases6/8 sections
I'll search for authoritative information on US patent 6950876, including USPTO records and any 2026 CAFC activity. Let me check for any litigation, PTAB, or Federal Circuit activity specifically involving this patent number. Let me…
View full analysis →added 9/17/2026 - US69525970 cases6/8 sections
I'll search for the specific patent number and any related litigation. US Patent 6,952,597 — Verified Summary Note on scope of search: I searched for this exact number (6,952,597) and its pre-grant publication US 2002/0137550 A1. I found…
View full analysis →added 9/26/2026 - US69528310 cases6/8 sections
I'll search for this specific patent number across the requested sources. Now let me check for any CAFC 2026 docket activity involving this patent number. US Patent 6,952,831 — Summary Sources searched: Google Patents full text…
View full analysis →added 9/24/2026 - US69548930 cases6/8 sections
I'll verify this specific patent number against live sources before summarizing. Let me pull the actual claim text and check for any 2026 CAFC activity. Let me try to retrieve the literal claim language, and one more check for…
View full analysis →added 9/24/2026 - US69571070 cases6/8 sections
I'll search for authoritative information on US 6,957,107 and any 2026 litigation activity. Let me verify the claim set and check for any 2026 litigation or PTAB activity specific to this patent. Let me retrieve the actual claim language…
View full analysis →added 9/25/2026 - US69615600 cases6/8 sections
I'll run several searches to check the USPTO record, the reissue, and any 2026 CAFC activity for this patent number. Let me check the reissue, the current assignee, and any litigation/CAFC activity specifically tied to this number. US…
View full analysis →added 9/24/2026 - US69638030 cases6/8 sections
I'll verify this against live sources, including any litigation activity. US Patent 6,963,803 — Verification Summary Search basis & caveat: I could not query USPTO PatentCenter or the CAFC docket system directly (no API access). I verified…
View full analysis →added 9/24/2026 - US69651750 cases6/8 sections
I'll verify current information on this patent via search, then summarize. Verification note up front I ran targeted searches on the exact string 6965175 / US6965175 rather than a family search. Results resolve to a single patent — US…
View full analysis →added 9/24/2026 - US6970930 cases6/8 sections
I'll run searches against the provided sources and live web to verify. Now let me check the CAFC docket angle and confirm the USPTO record details. US 697,093 — Verification Summary Searches run: Google Patents record, the scanned…
View full analysis →added 9/27/2026 - US69710280 cases6/8 sections
I'll search for this patent number across the sources you mentioned. Let me pull the claim set and check for any 2026 CAFC activity specifically involving this number. Let me try to retrieve the actual claim text, since the provided full…
View full analysis →added 9/24/2026 - US69750050 cases6/8 sections
I'll search for authoritative records on US 6,975,005, including any 2026 CAFC activity. Let me run additional targeted searches on court activity and USPTO records. One more targeted check on any adversarial proceedings involving this…
View full analysis →added 9/26/2026 - US6977700 cases6/8 sections
I'll run targeted searches on the exact identifier you gave, plus a deliberately separate query for the seven-digit look-alike so I can confirm I have not silently substituted it. One more pass to confirm the litigation angle before I…
View full analysis →added 9/24/2026 - US69783690 cases6/8 sections
I'll search for authoritative information on US patent 6978369, including any 2026 CAFC docket activity. Let me check for any CAFC 2026 docket or litigation activity specifically involving this patent. US Patent 6,978,369 — Analyst Summary…
View full analysis →added 9/29/2026