Observed arrival · 2026-10-13
Critical Date Search’s source-checked patent reports
A flat-fee prior-art search service for companies defending patent assertions, offering claim charts and quotations checked against source documents.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Companies and attorneys defending patent assertion campaigns
- Worth noticing
- The sample layout reports 19/19 quotations verified, 9/9 claim elements covered, and 82 prosecution citations screened.
Field notes
The described search extends beyond patent databases to product manuals, standards contributions, datasheets, trade press, and archived web pages. The sample layout labels two references with archive captures and shows how many days each predates the critical date. The site says reports are invoiced on delivery; its listed rates also decrease for additional defendants in the same campaign.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
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