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51. Classification bulletins. 427. Class 269, Work holders containing classification definitions of above class revised by Classification Group of Patent Office and established by classification order 272, dated Mar. 9, 1959.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1959.]
SuDoc number:: C 21.3:(nos.)

52. Classification bulletins. 429. Class 162, Paper making and fiber liberation, containing classification definitions of above class established by Classification Group of Patent Office by Classification order 276, Apr. 17, 1959.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1959.]
SuDoc number:: C 21.3:(nos.)

53. Classification bulletins. 431. Class 331, Oscillators, containing classification definitions of above class revised by Classification Group of Patent Office by classification order June 29, 1959.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1959.]
SuDoc number:: C 21.3:(nos.)

54. Classification bulletins. 424. Class 208, Mineral oils, processes and products, containing classification definitions of above class revised by Classification Group of Patent Office and established by classification order 258, Sept. 26, 1958.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [Oct. 1958.]
SuDoc number:: C 21.3:(nos.)

55. Classification bulletins. 105. Class 62, Refrigeration, containing schedule and definitions of above class revised by Classification Group, Patent Office and established by classification order 250, June 27, 1958. Revision 1.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1958.]
SuDoc number:: C 21.3:(nos.)

56. Classification bulletins. 300. Class 196, Mineral oils, apparatus, containing classification definitions of above class revised by Classification group, Patent Office and established by classification order 258, Sept. 26, 1958. Revision 1.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1958.]
SuDoc number:: C 21.3:(nos.)

57. Classification bulletin. 423. Class 171. Unearthing plants or buried objects, containing classification definitions of above class revised by Classification Group of Patent Office to include all chances through order 227, dated July 29, 1957.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1957.]
SuDoc number:: C 21.3:423

58. Classification bulletins. 141. Class 210, Liquid purification or separation, containing classification definitions of above class revised by Classification Group of Patent Office, to include all changes through order 216, dated Mar. 29, 1957.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: Revision 1. [1957.]
SuDoc number:: C 21.3:(nos.)

59. Classification bulletins. 329. Class 242, Winding and reeling, containing classification definitions of above class revised by Classification Group of Patent Office, to include all chances through order 223, dated May 22, 1957.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: Revision 1. [1957.]
SuDoc number:: C 21.3:(nos.)

60. Classification bulletin. 146. Class 5, Beds.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [Revised edition.] [June 1956.]
SuDoc number:: C 21.3:146/2

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