Reference Library

U.S. Patent Numbers

• Additional Improvement Patents, 1837-1861
• Application Series Codes
• Defensive Publications, 1968-1988 and Statutory Invention Registrations, 1985-2014
• Design Patents, 1842-present
• Kind Codes
• Patents, 1790-1836 (X Series)
• Patents, 1836-present
• Plant Patents, 1931-present
• Provisional Patent Applications, 1995-present
• Reissue Patents, 1838-present

Canadian Patent Numbers

• 1st Series, 1824-1871 (Upper Canada and Quebec)
• 2nd Series, 1869-2014
• 3rd Series, 1989-2014
• Kind Codes

Other Documents

• Directors of the U.S. Patent Office, 1790-present
• U.S. Patent Term Lengths