Calgary
Canada
15
2015-04-16
The entities that hold a legal rights for patent applications filed by inventor Logan Derek W.:
Derek W. Logan from Calgary, CA has applied for patents for these inventions. The list has both pending applications and granted patents:
Drill Bit Assembly Having Electrically Isolated Gap Joint for Measurement of Reservoir Properties
#2 | 2013-02-21Drill bit assembly having electrically isolated gap joint for measurement of reservoir properties
#3 | 2013-02-07Drill bit assembly having aligned features
#4 | 2011-12-22Electromagnetic telemetry assembly with protected antenna
#5 | 2011-09-22Brush and brush housing arrangement to mitigate hydrodynamic brush lift in fluid-immersed electric motors
#6 | 2011-02-17Electrical isolation connector for electromagnetic gap sub
#7 | 2010-06-24Acoustic isolator
#8 | 2010-02-25Electrical Isolation Connector For Electromagnetic Gap Sub
#9 | 2008-10-16Drill string telemetry methods and apparatus
#10 | 2008-08-14Electrical isolation connector for electromagnetic gap sub
#11 | 2007-11-08Acoustic telemetry system optimization
#12 | 2006-11-23Brush and brush housing arrangement to mitigate hydrodynamic brush lift in fluid-immersed electric motors
#13 | 2005-10-18Apparatus for receiving downhole acoustic signals
#14 | 2005-03-31Harsh environment rotatable connector
#15 | 2005-03-10Multi-conductor plug and socket apparatus
73881 ⎘