From the U.S. Patent and Trademark Office (USPTO). Searches three U.S. patent databases at the same time:
The USPTO provides answers to Frequently Asked Questions and Training Materials to help with Patent Public Search.
The Cooperative Patent Classification (CPC) database can be searched to find relevant classification schemes.
The worldwide database (from the European Patent Office) contains information on published patent applications and granted patents from over 100 patent-granting authorities. Can machine-translate patent documents.
Allows for full-text searching of patent grants and applications from the United States and from 100+ patent offices around the world.
The PATENTSCOPE database provides access to international Patent Cooperation Treaty (PCT) applications in full text format on the day of publication, as well as to patent documents of participating national and regional patent offices.
A product of Cambia, a global non-profit social enterprise. Provides patent searching and analysis from more than 95 jurisdictions.
The USPTO's Patent and Trademark Resource Center (PTRC) provides a CBT (computer based training) tutorial with a detailed review of how to conduct a preliminary U.S. Patent Search. This updated tutorial covers searching using the new Patent Public Search database, and talks about searching by Cooperative Patent Classification (CPC).
