Patent Searching Resources

Warning, patent searching should be done by a patent attorney who can properly analyze the language and legal implications of the prior art.

How to Search Patents Resources

Classification

US Patent Searching

Key Foreign Patent Offices

Directory of Intellectual Property Offices

Popular Free Patent Searching

Patent Printing (hard on USPTO Website)

Professional Fee Based Patent Searching

Less Popular Patent Searching Services

Popular Free Non-Patent Searching

Popular Fee Based Non-Patent Searching

General

Electrical Engineering and Software

Biotechnology

US Government

Other

Chemistry

Chemical Names

Mechanical

Business Methods

Publication Dates from Websites

Patent Analysis Software

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