TREA

Walter C. Palm

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  • Grand Rapids, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Air horn
    • Patent number 4,171,678
    • Issue date Oct 23, 1979
    • Midland-Ross Corporation
    • Walter C. Palm
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Grant

    Single-housing multi-trumpet air horn
    • Patent number 4,050,405
    • Issue date Sep 27, 1977
    • Midland-Ross Corporation
    • Walter C. Palm
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Grant

    Regulator for vehicle leveling systems
    • Patent number 3,955,590
    • Issue date May 11, 1976
    • Midland-Ross Corporation
    • Walter C. Palm
    • G05 - CONTROLLING REGULATING