TREA

Wynand M. Goyarts

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  • Washington, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Slide bar mining bolting machine
    • Patent number 4,640,369
    • Issue date Feb 3, 1987
    • Ingersoll-Rand Company
    • Wynand M. Goyarts
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rotating device for drill mast
    • Patent number 4,445,663
    • Issue date May 1, 1984
    • Lee-Norse Company
    • Wynand M. Goyarts
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Cutter bit assembly
    • Patent number 4,415,208
    • Issue date Nov 15, 1983
    • Ingersoll-Rand Company
    • Wynand M. Goyarts
    • E21 - EARTH DRILLING MINING