Classification bulletin of U.S. Patent Office from Jan. 1, 1930 to Dec. 31, 1930, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.

Bibliographic Details

Corporate Author:	United States. Patent Office
Format:	Government Document eBook
Language:	English
Published:	[Washington] : GPO, 1930.
Subjects:	Cold storage. Hardware. Metal trade. Shoes. Electronic books.
Online Access:	Connect to the full text of this electronic document