Sudoc Stem: I 23.3 - Blacklight Search Results

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1. Classification bulletin [53], July 1-Dec. 31, 1924, containing classification of subjects of invention revised by Classification Division.

Corporate/Agency Authors:: Patent Office and Interior Department
Publisher:: Patent Office
Date:: 1925
SuDoc number:: I 23.3:53

2. Classification bulletin [52], Jan. 1-June 30, 1924, containing classification of subjects of invention revised by Classification Division.

Corporate/Agency Authors:: Patent Office and Interior Department
Publisher:: Patent Office
Date:: 1924
SuDoc number:: I 23.3:52