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Rod lock out clamp
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Patent number 11,898,412
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Issue date Feb 13, 2024
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Oil Lift Technology Inc.
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Ross Willard Senger
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E21 - EARTH DRILLING MINING
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Polish rod locking clamp
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Patent number 10,087,696
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Issue date Oct 2, 2018
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Oil Lift Technology Inc.
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Vern A. Hult
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E21 - EARTH DRILLING MINING
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Polish rod locking clamp
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Patent number 9,322,238
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Issue date Apr 26, 2016
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Oil Lift Technology Inc.
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Vern A. Hult
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Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
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Safety guard for a rotatable member
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Patent number 9,074,727
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Issue date Jul 7, 2015
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Oil Lift Technology, Inc.
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Vern Hult
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Polish rod locking clamp
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Patent number 9,016,362
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Issue date Apr 28, 2015
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Oil Lift Technology Inc.
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Vern A. Hult
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E21 - EARTH DRILLING MINING
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Pump drive head with stuffing box
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Patent number 6,843,313
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Issue date Jan 18, 2005
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Oil Lift Technology, Inc.
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Vern A. Hult
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Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
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Slidable load lifting system
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Patent number 6,019,567
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Issue date Feb 1, 2000
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Lift Technologies, Inc.
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Gerald A. Lutkus
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B60 - VEHICLES IN GENERAL