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Ronald J. Holubec
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Houma, LA, US
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Patents Grants
last 30 patents
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Patent Grant
Anti-rotation method and apparatus for limiting rotation of cementi...
Patent number
7,080,687
Issue date
Jul 25, 2006
Halliburton Energy Services, Inc.
Charles A. Butterfield, Jr.
E21 - EARTH DRILLING MINING
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last 30 patents
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Patent Application
Anti-rotation method and apparatus for limiting rotation of cementi...
Publication number
20040144532
Publication date
Jul 29, 2004
Charles A. Butterfield
E21 - EARTH DRILLING MINING
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Patent Application
Anti-rotation method and apparatus for limiting rotation of cementi...
Publication number
20040016538
Publication date
Jan 29, 2004
Charles A. Butterfield
E21 - EARTH DRILLING MINING