Office of Patent Classification
The Office of Patent Classification maintains the U.S. Patent Classification system.
Organization and Staff
Patent Classification Resources
- Cooperative Patent Classification (CPC)
- Classification Concordance Patents, USPC to IPC
- Classification Definitions, Patent
- Classification Index, Patents
- Manual of Classification Schedules, Patent
- Consolidated Glossary of USPC Terms
- International Classification Resources
- Classification Orders
- Reclassification Alert Report [PDF]
- Classification Orders Index
- Classification Orders Index, Printable Index [PDF]
- Classification Orders Archival Report [PDF]
- All Withdrawn PGPubs
- All Withdrawn PGPubs, Printable File [PDF]
- Examiner's Handbook
- Handbook of Classification [PDF]
- Classes in the U.S. Patent Classification System - Dates Established
- Classification Under Reclass [PDF]
Documents and Reports Related to the Manual of Classification
- Overview of the Classification System [PDF]
- Classes Within the U.S. Classification System (Arranged by Related Subjects) [PDF]
- Classes Arranged by Art Unit
- Classes Arranged by Art Unit [PDF]
- Classes Arranged Numerically With Art Unit and Search Room Locations
- Classes Arranged Numerically With Art Unit and Search Room Locations, Printable File [PDF]
- Classes Arranged in Alphabetical Order [PDF]
Related Patent Links
Some contents linked to on this page require a plug-in for PDF files .
The Inventors Assistance Center is available to help you on patent matters. Send questions about USPTO programs and services to the USPTO Contact Center (UCC) . You can suggest USPTO webpages or material you would like featured on this section by E-mail to the webmaster@uspto.gov . While we cannot promise to accommodate all requests, your suggestions will be considered and may lead to other improvements on the website.
