Francis L. Davison

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for communicating with downhole measurement-wh...
- Patent number 4,736,204
- Issue date Apr 5, 1988
- NL Industries, Inc.
- Francis L. Davison
- E21 - EARTH DRILLING MINING
Information Patent Grant
Self-adjusting valve actuator
- Patent number 4,686,658
- Issue date Aug 11, 1987
- NL Industries, Inc.
- Francis L. Davison
- E21 - EARTH DRILLING MINING