Device for keeping index cards
United States Patent 3073050
US Patent References:
/1310468.html
- - 1310468

Card rack
- - 1676492

Card index
- - 1876207


Inventors:
Sven-otto, Dubois
Publication Date:
01/15/1963
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Assignee:
Sven-otto, Dubois
Primary Class:
40/124.400
Other Classes:
211/50, 24/DIG.009, 40/658, 24/67.900
International Classes:
B42F9/00
Foreign References:
FR912801A
FR1011400A