Perforator for wells
United States Patent 2315496

Inventors:
Alexander, Boynton
Publication Date:
04/06/1943
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Assignee:
Alexander, Boynton
Primary Class:
175/67
Other Classes:
411/403, 451/75, 451/40, 166/222, 175/424, 175/237, 37/344, 166/298, 166/55
International Classes:
E21B43/114; E21B43/11