Perforating machine
United States Patent 2800182
US Patent References:
/1110261.html
- - 1110261

/1138314.html
- - 1138314

Perforating machine
- - 1848159

/2623592.html
- - 2623592


Inventors:
Hamilton, Francis E.
Zuleeg, Charles C.
Brown, Edgar A.
Publication Date:
07/23/1957
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Assignee:
IBM
Primary Class:
234/64
Other Classes:
234/111, 234/88, 83/572