Patent & Trademark Resources on the Web

Provided by United States Patent and Trademark Office and Patent and Trademark Depository Library Program.

United States Patent Classification (USPC) tools uses three major hyperlinked resources: Index, Class Schedules (Manual of Classificaton) and Definitions

Gives a detailed view of the Classification System.

Is the new patent systems that will be used by the United States and the European Patent Office. Other countries may also move to this system. It is being phased into use on U.S. databases and is now available on Espacenet.

(IPC) is used in most countries of the world. The current version is 8th ed. This systems permits linking to various search websites. For example: esp@acenet

Is used with esp@cenet and is based on a previous version of IPC.