U.S. Patent and Trademark Office

U.S. Copyright Office

FirstGov Reference Shelf

American Intellectual Property Law Association

European Patent Office

Japanese Patent Office

Code of Federal Regulations

USPTO Patent Database

USPTO Trademark Database

WIPO PCT Database

Delphion Intellectual Property Network

MicroPatent Database

Optipat Database

Findlaw Intellectual Property

Nolo Press

National Library of Medicine PubMed (MEDLINE)

PatentCafe.com

Intellectual Property Information Mall