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Richard Duff
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Sherwood Park, CA
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last 30 patents
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Patent Grant
Hydraulic running tool with torque dampener
Patent number
6,467,547
Issue date
Oct 22, 2002
Weatherford/Lamb, Inc.
Patrick G. Maguire
E21 - EARTH DRILLING MINING
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last 30 patents
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Patent Application
Hydraulic running tool with torque dampener
Publication number
20020070032
Publication date
Jun 13, 2002
Patrick G. Maguire
E21 - EARTH DRILLING MINING