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Manual of classification of patents.

Description

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Corporate Author: United States.
Language(s): English
Published: Washington, Govt. print. off., 1923-
Subjects: Patents > Patents / United States.
Note: At head of title: Department of the interior. Hubert Work, secretary. United States Patent office. Thomas E. Robertson, commissioner.
Loose-leaf manual.
Physical Description: 231 p. 15 x 24 cm.
Locate a Print Version: Find in a library

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