EXHAUST VALVE FOR DIVER'S HELMET
United States Patent 3547146

Inventors:
Jones, Richard F.
Publication Date:
12/15/1970
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Assignee:
AGONIC ENG INC
Primary Class:
137/512
Other Classes:
137/614.190, 137/522
International Classes:
B63C11/12; B63C11/02; F16K17/06




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