James R. Hall

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Huffman, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Earth boring bit with protected seal means
- Patent number 5,129,471
- Issue date Jul 14, 1992
- Hughes Tool Company
- Cary A. Maurstad
- E21 - EARTH DRILLING MINING
Information Patent Grant
Tool joint with internal/external make-up shoulders
- Patent number 4,548,431
- Issue date Oct 22, 1985
- Hughes Tool Company - USA
- James R. Hall
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill string shock absorber with improved pin type torque transmiss...
- Patent number 4,210,316
- Issue date Jul 1, 1980
- Hughes Tool Company
- James R. Hall
- E21 - EARTH DRILLING MINING
Information Patent Grant
Support system for rotatable detecting element
- Patent number 4,061,967
- Issue date Dec 6, 1977
- Hughes Tool Company
- James R. Hall
- E21 - EARTH DRILLING MINING