Gun perforator
United States Patent 2304408

Inventors:
Holifield, Alsae J.
Publication Date:
12/08/1942
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Assignee:
Planck E. H.
Dees M. H.
Primary Class:
175/4.560
Other Classes:
175/296, 89/1.150
International Classes:
E21B43/116; E21B43/11