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Definitions of revised classes and subclasses of subjects of invention in the United States Patent office.
Arranged in numerical order. A supplement to the Manual of classification. Rev. to January 1, 1912 (including classification bulletin no. 27).

APA Citation

United States. Patent Office. (1912). Definitions of revised classes and subclasses of subjects of invention in the United States Patent office: Arranged in numerical order. A supplement to the Manual of classification. Rev. to January 1, 1912 (including classification bulletin no. 27). Washington: Govt. print. off..

MLA Citation

United States. Patent Office. Definitions of Revised Classes And Subclasses of Subjects of Invention In the United States Patent Office: Arranged In Numerical Order. A Supplement to the Manual of Classification. Rev. to January 1, 1912 (including Classification Bulletin No. 27). Washington: Govt. print. off., 1912.

Warning: These citations may not always be complete (especially for serials).

Definitions of revised classes and subclasses of subjects of invention in the United States Patent office. Arranged in numerical order. A supplement to the Manual of classification. Rev. to January 1, 1912 (including classification bulletin no. 27).

APA Citation

MLA Citation

Definitions of revised classes and subclasses of subjects of invention in the United States Patent office.
Arranged in numerical order. A supplement to the Manual of classification. Rev. to January 1, 1912 (including classification bulletin no. 27).