Well explosive device
United States Patent 2408419

Inventors:
Lewis, Foster James
Publication Date:
10/01/1946
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Assignee:
Lewis, Foster James
Primary Class:
175/3.500
Other Classes:
175/4, 175/4.560
International Classes:
E21B43/116; F42D1/05; E21B43/11; F42D1/00