- American Intellectual Property Law Association
- Code of Federal Regulations
- Delphion Intellectual Property Network
- European Patent Office
- Findlaw Intellectual Property
- FirstGov Reference Shelf
- Google Patents
- Japanese Patent Office
- Los Angeles Intellectual Property Law Assocation
- Optipat Database
- PAT2PDF
- U.S. Copyright Office
- USPTO Patent Database
- U.S. Patent and Trademark Office
- USPTO Trademark Database
- WIPO PCT Database

Useful links