Gun perforator device
United States Patent 2344778
Inventors:
Keplinger, Charles H.
Publication Date:
03/21/1944
Export Citation:
Assignee:
Shell, Dev
Primary Class:
Other Classes:
273/410, 89/1.150, 175/311
International Classes:
E21B27/00; E21B43/116; E21B43/11
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