Sold by the Superintendent of Documents. Manual of Classification. A loose-leaf manual containing a list of all the classes and subclasses of inventions in the Patent and Trademark Office classification systems, a subject matter index, and other information relating to U.S. patent classification system. Each subclass has a short, descriptive title often arranged in a specific hierarchical order designated by dots for indentation levels. Substitute pages are issued from time to time.
Annual subscription includes the basic manual and substitute pages.
Sold by the Superintendent of Documents. Gives a detailed definition for each class and official subclass included in the Manual of Classification. Subscription service consists of a basic full set of definitions and semiannual sets of updated definitions for an indeterminate period. Sold by the Superintendent of Documents. Title 37 Code of Federal Regulations.