Douglas B. Leeth

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Lake Charles, LA, US

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Patents Grantslast 30 patents

Information Patent Grant
Tool trap assembly and method
- Patent number 7,530,401
- Issue date May 12, 2009
- Max H. Smith
- E21 - EARTH DRILLING MINING
Information Patent Grant
Articulated drillstring entry apparatus and method
- Patent number 7,131,497
- Issue date Nov 7, 2006
- Specialty Rental Tools & Supply, LP
- Charles M. Helms
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Tool Trap Assembly and Method
- Publication number 20080236838
- Publication date Oct 2, 2008
- ADVANCE MANUFACTURING TECHNOLOGY, INC.
- Max H. Smith
- E21 - EARTH DRILLING MINING
Information Patent Application
ARTICULATED DRILLSTRING ENTRY APPARATUS AND METHOD
- Publication number 20050211443
- Publication date Sep 29, 2005
- Charles M. Helms
- E21 - EARTH DRILLING MINING
Information Patent Application
DEFLECTION SWIVEL AND METHOD
- Publication number 20050211444
- Publication date Sep 29, 2005
- Vernon E. Kauffman
- E21 - EARTH DRILLING MINING