Catalog Issue Year Decade: 1930 - 1939 / Sudoc Stem: C 21.12 - Blacklight Search Results

Start Over Catalog Issue Year Decade 1930 - 1939 Sudoc Stem C 21.12

41. Patents. [Manual of classification of patents, 1929, substitute pages containing corrections.]

Corporate/Agency Authors:: Patent Office
Publisher:: Patent Office
Date:: [1931.]
SuDoc number:: C 21.12:929/p.23, 24

42. Patents. [Manual of classification of patents, 1929, substitute pages containing corrections.]

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1931.]
SuDoc number:: C 21.12:929/p.225-228a

43. Patents. [Manual of classification of patents, 1929] errata and correction sheet, Jan. 1-Dec. 31, 1930.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1931.]
SuDoc number:: C 21.12:929/errata 930

44. Patents. [Manual of classification of patents, 1929] errata and minor correction sheet, Jan. 1-Dec. 31, 1929.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1930.]
SuDoc number:: C 21.12:929/errata 929

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