Federal workers in the patent office file room
Federal workers in the patent office file room, where patents are kept on file for public use. Feb. 29, 1940. (BSLOC_2013_8_177)
Picture No
11000133
Media ID
45256242
Size
3000px x 2307px
(1.7MB)
Credit
Everett Collection / Mary Evans
Source
Everett Collection
