Title:
Gas mask communication system
United States Patent 3180333


Inventors:
David, Lewis Robert
Application Number:
US28417963A
Publication Date:
04/27/1965
Filing Date:
05/29/1963
Assignee:
ACME PROT EQUIPMENT CO
Primary Class:
Other Classes:
2/6.6, 2/6.7, 381/75, 381/376, D24/110.2
International Classes:
A62B18/08
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