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Automatic sealing gate valve
US 2,570,413 A
Filed
: 09/08/1945
Issued
: 10/09/1951
Est. Priority Date
: 09/08/1945
Status: Expired due to Term
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Current Assignee
Alexander S. Volpin
Original Assignee
Alexander S. Volpin
Inventors
Volpin, Alexander S.
Application Number
US02/615,128
Time in Patent Office
2,222 Days
Field of Search
US Class Current
137/246.12
CPC Class Codes
F16K 3/36
Features relating to lubric...
Y10T 137/4372
Line pressure feed
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