Catalog Issue Year Decade: 1940 - 1949 / Sudoc Stem: C 21.3 - Blacklight Search Results

Start Over Catalog Issue Year Decade 1940 - 1949 Sudoc Stem C 21.3

21. Classification bulletin 85, class 260, Chemistry, carbon compounds, containing classification of above class revised by Classification Division, and including all changes through order no. 3728, dated May 28, 1943.

Corporate/Agency Authors:: Patent Office
Publisher:: Patent Office
Date:: [1943.]
SuDoc number:: C 21.3:85

22. Classification bulletin 81, July 1-Dec. 31, 1941, containing classification of subjects of invention revised by Classification Division.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1942.]
SuDoc number:: C 21.3:81

23. Classification bulletin 82, Jan. 1-June 30, 1942, containing classification of subjects of invention revised by Classilication Division.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1942.]
SuDoc number:: C 21.3:82

24. Classification bulletin 79, July 1, 1940-Mar. 31 1941, containing classification of subjects of invention revised by Classification Division.

Corporate/Agency Authors:: Patent Office
Publisher:: Patent Office
Date:: [1941.]
SuDoc number:: C 21.3:79

25. Classification bulletin 80, Apr. 1-June 30, 1941, containing classification of subjects of invention revised by Classification Division.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1941.]
SuDoc number:: C 21.3:80

26. Classification bulletin 77, July 1-Dec. 31, 1939, containing classification of subjects of invention revised by Classification Division.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1940.]
SuDoc number:: C 21.3:77

27. Classification bulletin 78, Jan. 1-June 30, 1040, containing classification of subjects of invention revised by Classification Division.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1940.]
SuDoc number:: C 21.3:78

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