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FLEXIBLE CHECK VALVE
US 3,422,844 A
Filed
: 03/05/1965
Issued
: 01/21/1969
Est. Priority Date
: 03/05/1965
Status: Expired due to Term
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Current Assignee
Grise Frederick G J
Original Assignee
Grise Frederick G J
Inventors
GRISE FREDERICK G J
Application Number
US04/437,463
Time in Patent Office
1,418 Days
Field of Search
US Class Current
137/847
CPC Class Codes
F16K 15/1441
with biasing means in addit...
F16K 15/147
the closure elements having...
Y10T 137/7882
Having exit lip
Y10T 137/7883
With biasing means
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