Classification bulletin of the United States Patent Office ...
containing the classification of subjects of invention ...
|Corporate Author:||United States.|
Washington, Gov't Print. Off. [etc.] 1900-
Earlier supplements to the Official gazette, containing the revised classification, were pub. in 1885, 1889, 1895 and 1897.
|Locate a Print Version:||
Find in a library
|Item Link||Original Source|
|Full view c.1 no.18-19,21-39 1906-17||University of Chicago|
|Full view c.1 no.40-44 1918-20||University of Chicago|
|Full view c.1 no.45-58 1920-27||University of Chicago|