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Combination oil well tubing and electrical cable construction
US 2,748,358 A
Filed
: 01/08/1952
Issued
: 05/29/1956
Est. Priority Date
: 01/08/1952
Status: Expired due to Term
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Current Assignee
Daniel S. Johnston
Original Assignee
Daniel S. Johnston
Inventors
Johnston, Daniel S.
Application Number
US03/265,424
Time in Patent Office
1,603 Days
Field of Search
US Class Current
439/194
CPC Class Codes
E21B 17/028
Electrical or electro-magne...
H01B 7/046
attached to objects sunk in...
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