Answering an Office Action, end to end
Three free tools for patent prosecution, right here in the browser. No account to create — the OA Agent runs on your own Anthropic API key, and the other two tools don't even need that.
or try the Patent Reader — nothing to set up
Your API key stays in this browser and goes straight to your agent session — it's never stored on the server.
The OA Agent in 40 seconds
Three tools, three jobs
Responding to an Office Action means reading the art the examiner cited, working out which rejections to fight and which to amend around, and making sure the amendments hold up. Each tool covers one of those. They run independently — there's no shared pipeline between them.
Read the cited art
Patent ReaderEnter a publication number and get claim dependency trees, reference numerals cross-linked to the figures, bounding boxes on the drawings, and multi-term search. Built for reading a reference the examiner cited against you.
Decide argue or amend
OA AgentAn AI agent that follows the examiner's paragraph and column citations into the actual prior art, maps each claim limitation to the evidence relied on, and recommends argue or amend. Every conclusion cites a passage you can open and check.
Check your amendments
Antecedent BasisPaste a claim set and get the §112 problems that creep in when claims are edited under time pressure — missing antecedent basis, ambiguous pronouns, unclear "such" phrases, prepositional scope, and silent reintroduction.
How it works
Built to show its work
The point is that you can check everything it tells you. Nothing it concludes is something you have to take on faith.
It opens the documents
When the examiner cites column 5 of a reference, the agent opens that reference and reads column 5. It works from the files in front of it, not from what it remembers about the patent.
You watch it work
You see which document it has open and which passage it's reading while it happens, rather than a summary afterwards. If it goes down the wrong path you'll know immediately.
Every claim is traceable
Each conclusion points at the passage it came from. Click it, read the source, and decide for yourself whether the reasoning holds.
Not everything is AI
The antecedent basis checker reads claim grammar directly rather than asking a model. It gives the same answer every time and can't invent a finding that isn't there.
Free, with one honest asterisk
The tools cost nothing to use and there's nothing to sign up for. The OA Agent thinks with Claude, and model usage is the expensive part — so it runs on your Anthropic API key, and Anthropic bills you directly for exactly what your sessions use. No subscription, no markup, no pricing page. The Patent Reader and Antecedent Basis checker use no AI models, so they're simply free.
Start in two minutes
Open the OA Agent, paste your Anthropic API key in Settings, and drop in your Office Action. The Patent Reader and Antecedent Basis checker don't even need the key.
Start free