Publisher: Patent Office / Publish Year Decade: 1920 - 1929 / Sudoc Stem: C 21.5/a 5 - Blacklight Search Results

Start Over Publisher Patent Office Publish Year Decade 1920 - 1929 Sudoc Stem C 21.5/a 5

1. Inventions. Changes in classification [of inventions], order 2902; Mar. 30, 1925.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1925.]
SuDoc number:: C 21.5/a 5:925/1