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... Manual of classification of patents ... January 1, 1940.

Description

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Corporate Author: United States.
Language(s): English
Published: Washington, U. S. Govt. print. off., 1940.
Subjects: Patents > Patents / United States.
Note: Loose-leaf.
At head of title: Department of commerce. United States Patent Office.
----...Index to classification of patents to accompany the Manual of classification of patents, revised to January 1, 1940 ... Washington, U.S. Govt. print. off., 1940. 1 v. 15x24 cm.
Physical Description: 1 v. 15 x 24 cm.
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