Trench-warfare device
United States Patent 1505168

Inventors:
Sparhawk, Charles E.
Publication Date:
08/19/1924
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Assignee:
Sparhawk, Charles E.
Primary Class:
109/47
Other Classes:
89/36.150, 248/906
International Classes:
F41A23/20; F41A23/24; F41A23/00