Each regional Patent Office provides an online searchable database.
Canadian Patents Database - CIPO
- This database contains over 2.3 million patent documents from 1869 to the present. This database is updated regularly with newly granted patents and applications opened to public inspection.
DEPATISnet
- Contains patents from the German patent information system.
Espacenet - European Patent office (EPO)
- European patents are searchable in the Espacenet database. Full text images of the documents are available as PDF files.
Japan Patent Office - JPO
- The JPO is responsible for the protection of the rights for patents for inventions, utility models for devices, industrial designs, and trademarks in Japan.
United States Patent and Trademark Office - USPTO
- Searchable, full-text database from January 1, 1976 onward (full-page images since 1790).