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Terry D. Mayfield
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Duncan, OK, US
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last 30 patents
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Patent Grant
Rigid adjustable length assembly
Patent number
4,603,887
Issue date
Aug 5, 1986
Halliburton Company
Terry D. Mayfield
E21 - EARTH DRILLING MINING
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Patent Grant
Fluid flow delivery system
Patent number
4,570,673
Issue date
Feb 18, 1986
Halliburton Company
William D. Kendrick
E21 - EARTH DRILLING MINING