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Eldon G. Bonnema

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  • Prinsburg, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Large diameter corrugated plastic pipe
    • Patent number 4,969,670
    • Issue date Nov 13, 1990
    • Prinsco, Inc.
    • Eldon G. Bonnema
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Bidirectional corrugated pipe-rib seal
    • Patent number 4,946,206
    • Issue date Aug 7, 1990
    • Prinsco, Inc.
    • Stephen L. Roe
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Large diameter double-walled plastic pipe
    • Patent number 4,913,473
    • Issue date Apr 3, 1990
    • Eldon G. Bonnema
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...