Examiner Handbook to the U.S. Patent Classification System
The U.S. Patent Classification system provides for the storage and retrieval of every patent document that a patent examiner needs to review when examining patent applications. 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 patrons of the Patent and Trademark Resource Center.
This Examiner Handbook is intended for use by U.S. patent examiners, although other users may find it helpful as well.
Table of Contents
I - Organization of Information
II - Aids to Searching or Placement
III - Patent Analysis for Placement into System (Claimed Disclosure)
IV - Determination of a Class for Original Classification or Assignment for Examination
V - Selection of Locus for Searching or Placement
VI - Originals vs. Cross-References
VII - Classification of Design Patents
Addendum - Reclassification in Classes 518 - 585
Appendix A - Structure of the Modern Schedule
For comments on this page, contact Elma LaTouche@uspto.gov
