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Pitch control capacitance coupling
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Patent number 4,756,667
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Issue date Jul 12, 1988
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United Technologies Corporation
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Albert J. Wyrostek
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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Wind turbine blade pitch control system
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Patent number 4,348,155
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Issue date Sep 7, 1982
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United Technologies Corporation
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Philip E. Barnes
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Power gearing
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Patent number 4,312,244
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Issue date Jan 26, 1982
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United Technologies Corporation
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Philip E. Barnes
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...