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Heart valve
US 3,416,562 A
Filed
: 12/30/1965
Issued
: 12/17/1968
Est. Priority Date
: 10/15/1965
Status: Expired due to Term
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Current Assignee
George Freeman Frank
Original Assignee
George Freeman Frank
Inventors
GEORGE FREEMAN FRANK
Application Number
US04/517,698
Time in Patent Office
1,083 Days
Field of Search
US Class Current
137/512.15
CPC Class Codes
A61F 2/2409
Support rings therefor, e.g...
A61F 2/2412
with soft flexible valve me...
F16K 15/1401
having a plurality of indep...
F16K 15/1402
having an integral flexible...
F16K 15/147
the closure elements having...
Y10T 137/784
Integral resilient member f...
Y10T 137/7891
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