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David J. Schroepfer

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  • Laguna Hills, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Airplane toilet drain valve assembly
    • Patent number 5,111,839
    • Issue date May 12, 1992
    • Rogerson Aircraft Corporation
    • David J. Schroepfer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...