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Duplex snubbing jack
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Patent number 10,605,015
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Issue date Mar 31, 2020
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ODFJELL PARTNERS INVEST LTD.
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David L. Sipos
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E21 - EARTH DRILLING MINING
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Wide open spider tool
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Patent number 10,053,932
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Issue date Aug 21, 2018
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Vermilion River Tool & Equipment Company, Inc.
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David L Sipos
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E21 - EARTH DRILLING MINING
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Gate elevator
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Patent number 9,869,144
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Issue date Jan 16, 2018
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Vermilion River Tool and Equipment Company
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David L. Sipos
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E21 - EARTH DRILLING MINING
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Tubular connection with slotted threads
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Patent number 7,513,537
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Issue date Apr 7, 2009
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Frank's Casing Crew and Rental Tools, Inc.
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Donald E. Mosing
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Slip manipulating apparatus
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Patent number 6,948,575
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Issue date Sep 27, 2005
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Frank's Casing Crews and Rental Tools, Inc.
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Donald E. Mosing
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E21 - EARTH DRILLING MINING
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Hammer piston handling apparatus
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Patent number 6,631,541
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Issue date Oct 14, 2003
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Frank's Casing Crew and Rental Tools, Inc.
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Donald E. Mosing
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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