Robert L. Coffee

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Newkirk, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Downhole activated process and apparatus for deep perforation of th...
- Patent number 5,224,556
- Issue date Jul 6, 1993
- Conoco Inc.
- Dennis R. Wilson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Pressure monitoring apparatus
- Patent number 4,867,237
- Issue date Sep 19, 1989
- Conoco Inc.
- Dennis R. Wilson
- E21 - EARTH DRILLING MINING