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Richard J. Wethern

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  • Beaverton, OR, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Impeller for mixing tanks
    • Patent number 4,615,623
    • Issue date Oct 7, 1986
    • Richard J. Wethern
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Propeller construction
    • Patent number 4,445,817
    • Issue date May 1, 1984
    • Richard J. Wethern
    • B64 - AIRCRAFT AVIATION COSMONAUTICS