TREA

William J. Roettger

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  • Rice, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Spring return cylinder actuator
    • Patent number 4,885,981
    • Issue date Dec 12, 1989
    • General Signal Corporation
    • William J. Roettger
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...