Anchor for index cards
United States Patent 2634730
US Patent References:
/1196769.html
- - 1196769
Locking device for index-cards
- - 1367550
Multiple purpose guide and retention clip
- - 2097018
/1196769.html
- - 1196769
Locking device for index-cards
- - 1367550
Multiple purpose guide and retention clip
- - 2097018
Inventors:
Hoffman, Harold J.
Publication Date:
04/14/1953
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Export Citation:
Assignee:
SMEAD MFG COMPANY
Primary Class:
International Classes:
B42F17/02; B42F17/00
Foreign References:
| DE678850C |