Catalog Issue Year Decade: 1950 - 1959 / Sudoc Stem: C 21.5/a 1 - Blacklight Search Results

Start Over Catalog Issue Year Decade 1950 - 1959 Sudoc Stem C 21.5/a 1

1. Classification of patents issued June 7-Nov. 29, 1949.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1949.]
SuDoc number:: C 21.5/a 1:623/1-628/5

2. Classification of patents issued Dec. 6, 1949-May 30, 1950.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
SuDoc number:: C 21.5/a 1:629/1-634/5

3. Classification of patents issued June 6-Dec. 20, 1950.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
SuDoc number:: C 21.5/a 1:635/1-041/4

4. Classification of patents.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
SuDoc number:: C 21.5/a 1:660/1-665/5

5. Classification of patents.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
SuDoc number:: C 21.5/a 1:647/1-653/4