Free tool · Patent claim diff
See exactly what changed.
Paste two versions of a patent claim — or any patent prose — and see a word-level redline. Useful for tracking claim amendments during prosecution, preparing IPR petitions, and drafting continuations.
Old version
New version
+12 added−1 removed
1. A method comprising: receiving, by a processor, an authenticateda request from a user; identifying a data record matching the request and the user's permissions; and returning the matching data record to the user via an encrypted channel.
Diff runs entirely in your browser — nothing is sent to a server. Useful for tracking patent prosecution amendments, IPR challenges, and comparing draft claims to issued claims.
Useful for
- Tracking USPTO office-action amendments — paste the original and amended claim, see which words were added to overcome the rejection.
- IPR preparation — compare your accused infringement reading against the literal claim text to identify defensible deltas.
- Continuation drafting — diff your continuation claims against the parent claims to confirm you're not adding new matter.
- Claim-construction prep for Markman — see what each side proposes vs. the original claim language.