TREA

Frederick A. Vitringa

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  • Quathiaski Cove, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Lateral compliance device for geophone springs
    • Patent number 4,685,094
    • Issue date Aug 4, 1987
    • Geosource Inc.
    • Frederick A. Vitringa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Delta-shaped geophone spring
    • Patent number 4,623,991
    • Issue date Nov 18, 1986
    • Geosource, Inc.
    • Frederick A. Vitringa
    • G01 - MEASURING TESTING