Publish Year Decade: 1950 - 1959 / Sudoc Stem: C 21.3 - Blacklight Search Results

Start Over Publish Year Decade 1950 - 1959 Sudoc Stem C 21.3

21. Classification bulletin. 419. Classification bulletin, June 21-25, 1954, containing classification order nos. 165 and 160, pertaining to classification of subjects of invention revised by Classification Group of Patent Office.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1954.]
SuDoc number:: C 21.3:419

22. Classification bulletin. 420. Classification bulletin, June 30, 1954, containing classification order 167 pertaining to classification of subjects of invention revised by Classification Group of Patent Office and includes class 221, Article dispensing.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1954.]
SuDoc number:: C 21.3:420

23. Classification bulletins. 283. Classification bulletin. June 14, 1954, containing classification order 164 pertaining to classification of subjects of invention, revised by Classification Group of Patent Office and includes Class 166, Wells.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: Revised [edition]. [1954.]
SuDoc number:: C 21.3:(nos.)

24. Classification bulletins. 415. Classification bulletin containing classification order nos. 149 through 156 pertaining to classification of subjects of invention revised by Classification group of Patent Office.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1954.]
SuDoc number:: C 21.3:(nos.)

25. Classification bulletins. 417. Classification bulletin, Jan. 4-Mar. 17, 1954, containing classification orders nos. 158-160, pertaining to classification of subjects of invention revised by classification group of Patent Office.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1954.]
SuDoc number:: C 21.3:(nos.)

26. Classification bulletins. 418. Classification bulletin. Apr. 19-May 10, 1951, containing classification order nos. 162 and 163, pertaining to classification of subjects of invention revised by Classification Group of Patent Office.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1954.]
SuDoc number:: C 21.3:(nos.)

27. Classification bulletin. 414. Class 317, Electricity, Class 324, Electricity, measuring and testing.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: Nov. 25, 1953
SuDoc number:: C 21.3:414

28. Classification bulletin. 232. Class 97, Plows.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: Revision 1 [May 1953.]
SuDoc number:: C 21.3:232/2

29. Classification bulletin 411, containing classification order nos. 140-143 pertaining to classification of subjects of invention revised by classification group of Patent Office.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1953.]
SuDoc number:: C 21.3:411

30. Classification bulletin. 410. Class 340, Communications, electrical.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1953.]
SuDoc number:: C 21.3:410

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