Index to the U.S. patent classification.

Description

Corporate Author: United States Patent and Trademark Office
Language(s): English
Published: Washington : Dept. of Commerce, Patent and Trademark Office, 1977, 1978 printing.
Subjects: Patents > Patents / United States > Patents / United States / Classification.
Patents > Patents / United States > Patents / United States / Indexes.
Indexes
Classification
Note: December 1977.
Physical Description: iv, 223 p. ; 28 cm.
ISBN
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