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United States Patent 2342659

Inventors:
Grove, Marvin H.
Annin, Douglas H.
Publication Date:
02/29/1944
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Assignee:
FLUID CONTROL ENGINEERING CO
Primary Class:
137/116.500
Other Classes:
137/543.190, 137/539.500, 251/321, 137/901, 137/505.420
International Classes:
G05D16/06; G05D16/04