Patent Searching

Espacenet - European Patent Office

Search titles of over 50 million patents from 71 countries. Full text PDF of US utility patents 1836-Present. Also see Espacenet Classification Search and Espacenet Online Tutorials


WIPO (world intellectual property organisation). 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.

US Patent Search

USPTO Inventor Assistance Center

Google Patent Search

Google Advanced Patent Search


Patents 101