Self sustaining paper punch frame assembly
United States Patent 3087367
US Patent References:
/0562981.html
- - 0562981

Magnetic core
- - 1783063

Punch
- - 2368790

Transformer core and method of making same
- - 2671951

Punch head slidably mounted on a frame
- - 2726721


Inventors:
Semler, Loren H.
Publication Date:
04/30/1963
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Assignee:
METAL SPECIALTIES MFG CO
Primary Class:
83/588
Other Classes:
83/698.910, 83/146, 83/635, 30/358
International Classes:
B26F1/36; B26F1/32
US Patent References:
2749816Paper fastening device
2825407Gang punch
2883228Closure fastener
Foreign References:
DE198071C