Handbook of Classification
Trademark Office, United States Patent a / Commerce, Department of
The USPC system provides for the storage and retrieval of every U.S. patent document. Therefore, in the aggregate, the system must be exhaustive of all patentable subject matter under patent laws. Although the system is primarily designed to assist patent examiners performing patentability searches, the system is used by a wide variety of other users, e.g., patent attorneys and agents, people involved in research and development, and the patro...