Classification bulletins. 392. Class 251, Valves and valve actuation.
Publication Title:
Class 251, Valves and valve actuation.
Display Title:
Classification bulletins. 392. Class 251, Valves and valve actuation.
Series Title:
Classification bulletins.
Corporate Agency Authors:
Patent Office and Commerce Dept.
Sort Author:
Patent Office
Date:
Revised [edition]. June 1954
Publish Date ISO Format:
1954-06-01T00:00:00Z
Publication Start:
19540601
Publication End:
19540630
Corporate/Agency Author:
Patent Office
Publication month:
7
Publication year:
1954
SuDoc number:
C 21.3:(nos.)
Description:
[2]+1+55+[43] p. 4°
Notes:
[Contains Classification order 161 pertaining to classification of subjects of invention revised by classification group of Patent Office.] and [Issued with perforations.]
Notes:
[Issued with perforations.] • Sent to Depository Libraries. Item 252
Availability:
* For Sale by Superintendent of Documents. Paper, $1.25. and • Sent to Depository Libraries. Item 252