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Anti-jam hydraulic servo valve
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Patent number 4,333,387
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Issue date Jun 8, 1982
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Bertea Corporation
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Clyde R. Seitz
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F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
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Optical position transducer
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Patent number 4,333,009
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Issue date Jun 1, 1982
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Bertea Corporation
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Curtis E. Stevens
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G01 - MEASURING TESTING
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Anti-jam mechanism for actuation pistons
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Patent number 4,167,135
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Issue date Sep 11, 1979
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Bertea Corporation
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Charles T. Lindsey
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Ratio select mechanism
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Patent number 4,132,126
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Issue date Jan 2, 1979
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Bertea Corporation
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David C. Hussey
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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Control system for aircraft
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Patent number 4,132,378
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Issue date Jan 2, 1979
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Bertea Corporation
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Curtis E. Stevens
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G05 - CONTROLLING REGULATING
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Pressure plug and method
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Patent number 4,091,841
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Issue date May 30, 1978
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Bertea Corporation
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Claus Beneker
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Solenoid valve
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Patent number 3,960,361
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Issue date Jun 1, 1976
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Bertea Corporation
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Ray A. York
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...