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Method and an apparatus for installing underground pipes
US 3,415,329 A
Filed
: 01/13/1967
Issued
: 12/10/1968
Est. Priority Date
: 01/20/1966
Status: Expired due to Term
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Current Assignee
Goran Marlind
Original Assignee
Goran Marlind
Inventors
GORAN MARLIND
Application Number
US04/609,190
Time in Patent Office
697 Days
Field of Search
US Class Current
175/19
CPC Class Codes
E21B 7/046
horizontal drilling drillin...
E21B 7/06
Deflecting the direction of...
E21B 7/064
specially adapted drill bit...
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