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Wheelchair steering
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Patent number 4,852,679
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Issue date Aug 1, 1989
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Jeremy J. Fry
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Valve actuators
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Patent number 4,584,902
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Issue date Apr 29, 1986
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Rotork Controls Limited
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Jeremy J. Fry
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Valve actuators
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Patent number 4,546,671
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Issue date Oct 15, 1985
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Rotork Controls Limited
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Jeremy J. Fry
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Valve actuators
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Patent number 4,445,075
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Issue date Apr 24, 1984
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Rotork Controls Limited
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Jeremy J. Fry
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Fail-safe device for actuators
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Patent number 4,350,081
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Issue date Sep 21, 1982
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Rotork Controls Limited
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Jeremy J. Fry
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F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL