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COMPENSATED ACTION NONRETURN EXHALATION VALVE,MORE PARTICULARLY FOR RESPIRATORY MASK
US 3,444,857 A
Filed
: 10/11/1965
Issued
: 05/20/1969
Est. Priority Date
: 03/19/1962
Status: Expired due to Term
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Current Assignee
Godel Edouard Paul Victor Raou
Original Assignee
Godel Edouard Paul Victor Raou
Inventors
GODEL EDOUARD PAUL VICTOR RAOU
Application Number
US04/494,709
Time in Patent Office
1,317 Days
Field of Search
US Class Current
128/205.24
CPC Class Codes
A62B 9/02
Valves non-return valves mo...
Y10T 137/7905
Plural biasing means
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