Perforating device
United States Patent 2142728

Inventors:
Frits, Kienzle
Publication Date:
01/03/1939
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Assignee:
Buckau, Wolf Maschf R. A. G. FA.
Primary Class:
83/328
Other Classes:
83/436.700, 83/660, 28/115, 26/1, 28/106
International Classes:
B26F1/24; B26F1/00