Author: Commerce Department / Catalog Issue Year Decade: 1940 - 1949 / Sudoc Stem: C 21.5/a - Blacklight Search Results

Start Over Author Commerce Department Catalog Issue Year Decade 1940 - 1949 Sudoc Stem C 21.5/a

1. Patents. Classification of patents issued Oct. 7-28, 1941.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1941.]
SuDoc number:: C 21.5/a:531/1-4