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Boom control system
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Patent number 4,910,662
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Issue date Mar 20, 1990
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Sundstrand-Sauer
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Richard K. Heiser
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Electronic valve actuator
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Patent number 4,845,416
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Issue date Jul 4, 1989
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Caterpillar Inc.
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Rolland D. Scholl
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G05 - CONTROLLING REGULATING
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Boom control system
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Patent number 4,791,549
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Issue date Dec 13, 1988
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Sundstrand Corporation
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Richard K. Heiser
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Power transmission
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Patent number 4,774,651
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Issue date Sep 27, 1988
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Vickers, Incorporated
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Yehia M. El-Ibiary
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G05 - CONTROLLING REGULATING
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Power transmission
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Patent number 4,745,744
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Issue date May 24, 1988
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Vickers, Incorporated
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Jeffrey P. Cherry
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G05 - CONTROLLING REGULATING
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Boom control system
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Patent number 4,722,044
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Issue date Jan 26, 1988
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Sundstrand Corporation
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Richard K. Heiser
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Power transmission
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Patent number 4,651,272
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Issue date Mar 17, 1987
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Vickers, Incorporated
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Yehia M. El-Ibiary
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G05 - CONTROLLING REGULATING
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