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Automatic safety air valve coupling
US 2,535,740 A
Filed
: 11/17/1947
Issued
: 12/26/1950
Est. Priority Date
: 11/17/1947
Status: Expired due to Term
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Current Assignee
William Knopp
Original Assignee
William Knopp
Inventors
Knopp, William
Application Number
US02/786,432
Time in Patent Office
1,135 Days
Field of Search
US Class Current
137/614.02
CPC Class Codes
B60T 17/043
Brake line couplings, air h...
F16L 37/256
the coupling not being coax...
Y10T 137/87941
Each valve and/or closure o...
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