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MARINE CORER WITH VALVE
US 3,497,018 A
Filed
: 10/09/1968
Issued
: 02/24/1970
Est. Priority Date
: 10/09/1968
Status: Expired due to Term
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Current Assignee
George W. Gibson
,
William S. Shultz
Original Assignee
George W. Gibson
,
William S. Shultz
Inventors
Shultz, William S.
,
Gibson, George W.
Application Number
US04/766,054
Time in Patent Office
503 Days
Field of Search
US Class Current
175/6
CPC Class Codes
E21B 25/18
the core receiver being spe...
E21B 7/124
with underwater tool drive ...
G01N 1/08
involving an extracting too...
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