Paper punch
United States Patent 2534094
US Patent References:
/1205257.html
- - 1205257

Centering device
- - 1424895

Punch
- - 1655315

Paper punch
- - 2327646

Multiple perforator
- - 2389105


Inventors:
Yerkes, John A.
Publication Date:
12/12/1950
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Assignee:
Yerkes, John A.
Primary Class:
83/449
Other Classes:
83/549
International Classes:
B26F1/04; B26F1/36; B26F1/02; B26F1/32
US Patent References:
2368790Punch
2445093Self-centering gauge for perforating devices