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Free-fall core sampler
US 3,372,760 A
Filed
: 03/30/1965
Issued
: 03/12/1968
Est. Priority Date
: 03/30/1965
Status: Expired due to Term
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Current Assignee
Peter L. Sachs
,
Samuel O. Raymond
Original Assignee
Peter L. Sachs
,
Samuel O. Raymond
Inventors
Raymond, Samuel O.
,
Sachs, Peter L.
Application Number
US04/444,094
Time in Patent Office
1,078 Days
Field of Search
US Class Current
175/5
CPC Class Codes
E21B 25/18
the core receiver being spe...
E21B 7/124
with underwater tool drive ...
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