John T. Gilcrease

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Las Vegas, NV, US

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Patents Grantslast 30 patents

Information Patent Grant
Auger and sweeper assembly
- Patent number 5,067,569
- Issue date Nov 26, 1991
- John T. Gilcrease
- E21 - EARTH DRILLING MINING
Information Patent Grant
Auger and retaining shell assembly
- Patent number 5,067,570
- Issue date Nov 26, 1991
- John T. Gilcrease
- E21 - EARTH DRILLING MINING