TREA

Joseph W. Griffith

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  • Portland, OR, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Air assisted hand held welding tool
    • Patent number 4,559,437
    • Issue date Dec 17, 1985
    • Tektronix, Inc.
    • Joseph W. Griffith
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Loudspeaker coupler
    • Patent number 4,206,831
    • Issue date Jun 10, 1980
    • Welch; Robert B.
    • Robert B. Welch
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Grant

    Loudspeaker
    • Patent number D252025
    • Issue date Jun 5, 1979
    • Robert B. Welch
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Tone arm system for record turntable
    • Patent number 4,127,274
    • Issue date Nov 28, 1978
    • Joseph W. Griffith
    • G11 - INFORMATION STORAGE