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Adjustable isolation sleeve
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Patent number 6,039,120
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Issue date Mar 21, 2000
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Kvaerner Oilfield Products
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Robert Lee Wilkins
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E21 - EARTH DRILLING MINING
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Tree bore protector
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Patent number 6,003,602
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Issue date Dec 21, 1999
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Kraerner Oilfield Products
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Robert Lee Wilkins
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E21 - EARTH DRILLING MINING
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Subsea wellhead
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Patent number 5,372,199
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Issue date Dec 13, 1994
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Cooper Industries, Inc.
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Eugene J. Cegielski
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E21 - EARTH DRILLING MINING
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Flowline safety joint
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Patent number 5,248,166
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Issue date Sep 28, 1993
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Cooper Industries, Inc.
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Robert L. Wilkins
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E21 - EARTH DRILLING MINING
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Internal tube cutter
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Patent number 4,142,429
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Issue date Mar 6, 1979
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Westinghouse Electric Corp.
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Robert L. Wilkins
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR