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Suction dredge relief valve system
US 2,572,263 A
Filed
: 05/02/1949
Issued
: 10/23/1951
Est. Priority Date
: 05/02/1949
Status: Expired due to Term
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Current Assignee
David L. Hofer
Original Assignee
David L. Hofer
Inventors
Hofer, David L.
Application Number
US03/090,809
Time in Patent Office
904 Days
Field of Search
US Class Current
37/311
CPC Class Codes
E02F 3/907
Measuring or control device...
Y10T 137/2924
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