Who is U.S. Patent and Trademark Office?
The USPTO examines and publishes U.S. patents. Patent Public Search replaced older public systems so inventors, founders, and advisors can query patent documents online.
USPTO Patent Public Search
Patent Search
Search published U.S. patents and applications in the USPTO Patent Public Search tool. Use it to research prior art, competitive filings, or whether an idea already appears in the public record.
What you can do here
Basic and advanced search modes let you look up patents by keyword, inventor, publication number, and more. This is research only: it does not file a patent or replace advice from a registered patent practitioner.
Why check this from WellDoIt
- You are evaluating whether an invention or product feature already shows up in published patents.
- You are preparing for a conversation with counsel or an advisor about IP strategy.
- You want to review a competitor’s published filings in the official U.S. database.
Ready to continue?
Official USPTO tool. Pair research with qualified counsel before filing or relying on results.