Publish Year Decade: 1960 - 1969 / Sudoc Stem: C 21.8 - Blacklight Search Results

Start Over Publish Year Decade 1960 - 1969 Sudoc Stem C 21.8

1. Classification bulletin. 436. Class 50, Building structures, containing classification definitions of above class established by Classification Group of Patent Office by classification order 304, June 30, 1960.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
Date:: [1960.)
SuDoc number:: C 21.8:436