David R. Woodruff

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Fort Smith, AR, US

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Patents Grantslast 30 patents

Information Patent Grant
Low profile rotating control device
- Patent number 8,286,734
- Issue date Oct 16, 2012
- Weatherford/Lamb, Inc.
- Don M. Hannegan
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC

Patents Applicationslast 30 patents

Information Patent Application
LOW PROFILE ROTATING CONTROL DEVICE
- Publication number 20150211319
- Publication date Jul 30, 2015
- WEATHERFORD/LAMB, INC.
- Don M. HANNEGAN
- E21 - EARTH DRILLING MINING
Information Patent Application
Low Profile Rotating Control Device
- Publication number 20130009366
- Publication date Jan 10, 2013
- WEATHERFORD/LAMB, INC.
- Don M. Hannegan
- E21 - EARTH DRILLING MINING
Information Patent Application
Low profile rotating control device
- Publication number 20090101411
- Publication date Apr 23, 2009
- WEATHERFORD/LAMB, INC.
- Don M. Hannegan
- E21 - EARTH DRILLING MINING