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James Burnthrone, Jr.
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Houma, LA, US
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Patents Grants
last 30 patents
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Patent Grant
Field adjustable impact jar
Patent number
7,281,575
Issue date
Oct 16, 2007
Fay McElroy
E21 - EARTH DRILLING MINING
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Patent Grant
Field adjustable impact jar
Patent number
7,111,678
Issue date
Sep 26, 2006
Impact Selector, Inc.
Fay McElroy
E21 - EARTH DRILLING MINING