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Heat recoverable locking device
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Patent number 4,619,568
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Issue date Oct 28, 1986
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Kenneth J. Carstensen
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Thread and bearing lubricant
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Patent number 4,525,287
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Issue date Jun 25, 1985
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Kenneth J. Carstensen
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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Power tongs
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Patent number 4,334,444
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Issue date Jun 15, 1982
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Bob's Casing Crews
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Kenneth J. Carstensen
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E21 - EARTH DRILLING MINING
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Power tongs
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Patent number 4,215,602
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Issue date Aug 5, 1980
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Bob's Casing Crews
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Kenneth J. Carstensen
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E21 - EARTH DRILLING MINING