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61. Classification bulletins. 126. Class 285, pipe joints or couplings.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [Revised edition.] [June 1956.]
SuDoc number:: C 21.3:(nos.)

62. Classification bulletins. 131. Class 33, geometrical instruments.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [Revised edition.] [June 1956.]
SuDoc number:: C 21.3:(nos.)

63. Classification bulletins. 402. Class. 53, Package marking.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: Revised [edition.] [Mar.-Apr. 1956.]
SuDoc number:: C 21.3:(nos.)

64. Classification bulletin. 151. Class 16, Miscellaneous hardware.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [Revised edition.] [1956.]
SuDoc number:: C 21.3:151/2

65. Classification bulletin. 153. Class 20, Wooden buildings, containing classification definitions of above class revised bY classification group of Patent Office, to include all changes through order 197, dated June 28, 1956. Revision 1.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1956.]
SuDoc number:: C 21.3:(nos.)

66. Classification bulletin. 422. class 96, Photographic chemistry, processes and materials, containing classification definitions of above class revised by classification group of Patent Office to include all changes through order 206, dated Nov. 23, 1956.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1956.]
SuDoc number:: C 21.3:(nos.)

67. Classification bulletins. 155. Revision 1, class 24, Buckles, buttons, clasps, etc., containing definitions of above class revised by classification group of Patent Office, to include all changes through order 197, dated June 28, 1956.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1956.]
SuDoc number:: C 21.3:(nos.)

68. Classification bulletins. 200. Revision 1, class 260, Chemistry, carbon compounds, containing classification definitions of above class revised by Classification Group of Patent Office, to include all changes through order 192, dated Mar. 16, 1956.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1956.]
SuDoc number:: C 21.3:(nos.)

69. Classification bulletins. 313. Class 219, Electric heating, containing classification definitions of above class revised by Classification Group of Patent Office, to include all changes through order 200, dated Aug. 30, 1956.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1956.]
SuDoc number:: C 21.3:(nos.)

70. Classification bulletins. 421. Class 141, Fluent material handling, with receiver or receiver coacting means, containing classification definitions of above class revised by Classification Group of Patent Office, to include all changes through order 203, dated Sept. 28, 1956.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1956.]
SuDoc number:: C 21.3:(nos.)

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