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ELECTRIC DRIVE TO BE EMPLOYED IN A DRILLING RIG
US 3,538,363 A
Filed
: 09/26/1968
Issued
: 11/03/1970
Est. Priority Date
: 09/26/1968
Status: Expired due to Term
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Current Assignee
Kagan Solomon Yakovlevich
,
Maryanovsky David Isaakovich
,
Pekhviashvili Vasily Vissarion
,
Takoev Dzandar Avsimaikhovich
,
Trifonov Valentin Lavrovich
Original Assignee
Kagan Solomon Yakovlevich
,
Maryanovsky David Isaakovich
,
Pekhviashvili Vasily Vissarion
,
Takoev Dzandar Avsimaikhovich
,
Trifonov Valentin Lavrovich
Inventors
MARYANOVSKY DAVID ISAAKOVICH
,
KAGAN SOLOMON YAKOVLEVICH
,
TAKOEV DZANDAR AVSIMAIKHOVICH
,
PEKHVIASHVILI VASILY VISSARION
,
TRIFONOV VALENTIN LAVROVICH
Application Number
US04/762,939
Time in Patent Office
768 Days
Field of Search
US Class Current
310/98
CPC Class Codes
H02P 1/166
Driving load with high inertia
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