Publisher: Patent Office / Catalog Issue Year Decade: 1930 - 1939 - Blacklight Search Results

Start Over Publisher Patent Office Catalog Issue Year Decade 1930 - 1939

2341. Patents. Classification of patents issued June 2-30, 1931.

Corporate/Agency Authors:: Patent Office
Publisher:: Patent Office
Date:: [1931.]
SuDoc number:: C 21.5/a 1:407/1-5

2342. Patents. Classification of patents issued Mar. 3-31, 1931.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1931.]
SuDoc number:: C 21.5/a 1:404/1-5

2343. Patents. Classification of patents issued May 5-26, 1931.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1931.]
SuDoc number:: C 21.5/a 1:406/1-4

2344. Patents. Classification of patents issued Nov. 3-24, 1931.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1931.]
SuDoc number:: C 21.5/a 1:412/1-4

2345. Patents. Classification of patents issued Oct. 6-27, 1931.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1931.]
SuDoc number:: C 21.5/a 1:411/1-4

2346. Patents. Classification of patents issued Sept. 1-29, 1931.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1931.]
SuDoc number:: C 21.5/a 1:410/1-5

2347. Patents. General information concerning patents [Mar. 1931].

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: 1931
SuDoc number:: C 21.2:P 27/931

2348. Patents. Index of patents issued from Patent Office, 1930.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: 1931
SuDoc number:: C 21.5/2:930

2349. 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

2350. 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

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