Available Indexes

Manual of classification of subjects of invention of the United States Patent office.
Rev. to January 1, 1912 (including classification bulletin no. 27)

Description

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Corporate Author: United States.
Language(s): English
Published: Washington, Govt. print. off., 1912.
Physical Description: 99 p. 29 1/2 cm.
Locate a Print Version: Find in a library

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