Index to the U.S. patent classification system, December 1996.
Contributors: United States. Patent and Trademark Office.
Publisher: U.S. Dept. of Commerce, U.S. Patent and Trademark Office; For sale by the Supt. of Docs., U.S. G.P.O.
Published: 1996
Place of publication: [Washington, D.C.]
Language: eng
Number of pages: 244
Subjects: Patents -- United States -- Indexes; Patents -- United States -- Classification
Genres: Indexes.; Classification.
Notes: Includes index.