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HYDRAULIC-DRIVE DRILLING
US 3,464,502 A
Filed
: 11/06/1967
Issued
: 09/02/1969
Est. Priority Date
: 11/06/1967
Status: Expired due to Term
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Current Assignee
Robert W. Ageton
Original Assignee
Robert W. Ageton
Inventors
Ageton, Robert W.
Application Number
US04/680,616
Time in Patent Office
666 Days
Field of Search
US Class Current
173/20
CPC Class Codes
E21B 19/08
Apparatus for feeding the r...
E21B 19/086
with a fluid-actuated cylin...
E21B 44/06
in response to the flow or ...
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