Brent G. Stephenson

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Oklahoma City, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Modular compaction boring machine system
- Patent number 9,850,715
- Issue date Dec 26, 2017
- The Charles Machine Works, Inc.
- Jerry W. Beckwith
- E21 - EARTH DRILLING MINING
Information Patent Grant
Dual-member auger boring system
- Patent number 7,389,831
- Issue date Jun 24, 2008
- The Charles Machine Works, Inc.
- H. Stanley Mullins
- E21 - EARTH DRILLING MINING
Information Patent Grant
Downhole generator for horizontal directional drilling
- Patent number 6,672,409
- Issue date Jan 6, 2004
- The Charles Machine Works, Inc.
- Matthew L. Dock
- E21 - EARTH DRILLING MINING
Information Patent Grant
Directional boring head with blade assembly
- Patent number RE37975
- Issue date Feb 4, 2003
- The Charles Machine Works, Inc.
- Brent G. Stephenson
- 175 - Boring or penetrating the earth
Information Patent Grant
Directional boring head with blade assembly
- Patent number 5,941,322
- Issue date Aug 24, 1999
- The Charles Machine Works, Inc.
- Brent G. Stephenson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Directional boring head with blade assembly
- Patent number 5,799,740
- Issue date Sep 1, 1998
- The Charles Machine Works, Inc.
- Brent G. Stephenson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill pipe
- Patent number 5,713,423
- Issue date Feb 3, 1998
- The Charles Machine Works, Inc.
- J. Scott Martin
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Dual-member auger boring system
- Publication number 20080073123
- Publication date Mar 27, 2008
- H. Stanley Mullins
- E21 - EARTH DRILLING MINING