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Quick drop valve control
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Patent number 5,907,991
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Issue date Jun 1, 1999
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Caterpillar Inc.
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Chandrasekar Ramamoorthy
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Capacitive flow sensor
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Patent number 5,672,831
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Issue date Sep 30, 1997
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Caterpillar Inc.
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George Codina
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G01 - MEASURING TESTING
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-
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Multi-purpose capacitive sensor
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Patent number 5,646,539
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Issue date Jul 8, 1997
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Caterpillar Inc.
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George Codina
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F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
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Capacitive oil life sensor
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Patent number 5,631,568
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Issue date May 20, 1997
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Caterpillar Inc.
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George Codina
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES