Patent Bear insideClaude,ChatGPT and Codex,and Gemini.

Search, Research, Draft, and Library, as tool calls in your agent. Listed in the Claude connector directory. Connect now

Search

Free

Patent search
US and EP grants, publications, and applications, full text.
Advanced search
Assignee, inventor, classification, dates, citations.
Cases
District court and Federal Circuit decisions, readable page by page.
PTAB
Board decisions in IPR, PGR and CBM trials by outcome, denial basis, panel and petitioner.
Reader
Claims, specification, figures, and highlights on the issued PDF, cited col:line.
Sequence and chemistry
DNA, RNA, and protein by homology. Chemistry by substructure or similarity.
File histories
Any application with its prosecution history, free. Download documents one at a time or merged.

Research

Analyses

All of Research

Draft

From the record

All drafts, including what is in build

Library

Yours, private

Open the Library

Update · Mar 16–20, 2026

AI patent chat arrives, with citations you can actually check.

Note from the developers

Chat over a patent with inline citations, annotation sharing, reading settings, and the first advanced search.

New
AI patent chat
Added AI chat over a patent with inline citations.
Learn more →
New
Reading settings
Reading settings plus token-based chat limits.
New
Annotation sharing
Share annotations with others.
Learn more →
Improved
Citation accuracy
Exact-match paragraph finder and copy button for chat citations.
Learn more →
New
Advanced search
Added advanced search.
Learn more →

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