Title:
Device for keeping index cards
United States Patent 3073050
Inventors:
Sven-otto, Dubois
Publication Date:
01/15/1963
Export Citation:
Click for automatic bibliography generation
Assignee:
Sven-otto, Dubois
Primary Class:
40/124.4
Other Classes:
24/67.9, 24/DIG.9, 40/658, 211/50
International Classes:
B42F9/00; B42F9/00
View Patent Images:
Download PDF 3073050        PDF help
US Patent References:
1876207Card index
1676492Card rack
1310468N/A
Foreign References:
FR912801A
FR1011400A