Michael Twigger

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Blackburg, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Automated continuous haulage system
- Patent number 7,076,346
- Issue date Jul 11, 2006
- DBT America, Inc.
- Robert H. Sturges
- G01 - MEASURING TESTING
Information Patent Grant
Method and apparatus for safety protection of temporary roof support
- Patent number 6,945,738
- Issue date Sep 20, 2005
- DBT America
- Roger O'Quinn
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Method and apparatus for safety protection of temporary roof support
- Publication number 20050073189
- Publication date Apr 7, 2005
- Roger O'Quinn
- E21 - EARTH DRILLING MINING
Information Patent Application
Automated continuous haulage system
- Publication number 20040054434
- Publication date Mar 18, 2004
- Robert H. Sturges
- E21 - EARTH DRILLING MINING