Leon B. Stinson

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Drill bit utilizing lubricant thermal expansion and relief valve fo...
- Patent number 4,019,785
- Issue date Apr 26, 1977
- Hughes Tool Company
- Leon Berthal Stinson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Rock bit with quick change connection
- Patent number 3,986,570
- Issue date Oct 19, 1976
- Hughes Tool Company
- Leon B. Stinson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Rotary percussion earth boring bit
- Patent number 3,941,197
- Issue date Mar 2, 1976
- Hughes Tool Company
- Leon B. Stinson
- E21 - EARTH DRILLING MINING