Projectile
United States Patent 2121796

Inventors:
Helbich, Josef E.
Publication Date:
06/28/1938
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Assignee:
Helbich, Josef E.
Primary Class:
102/517
Other Classes:
42/76.010
International Classes:
F42B10/42; F42B14/06; F42B10/00; F42B14/00