George F. Gehrig

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for determining fluid circulation conditions i...
- Patent number 4,610,161
- Issue date Sep 9, 1986
- Exxon Production Research Co.
- George F. Gehrig
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for monitoring fluid flow between a borehole a...
- Patent number 4,553,429
- Issue date Nov 19, 1985
- Exxon Production Research Co.
- John L. Evans
- E21 - EARTH DRILLING MINING