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Donald Mathews

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  • Godwin, NC, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Auger bit
    • Patent number 6,955,234
    • Issue date Oct 18, 2005
    • BellSouth Intellectual Property Corporation
    • Donald Mathews
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Boring machine and auger bit
    • Patent number 6,675,916
    • Issue date Jan 13, 2004
    • Donald Mathews
    • E21 - EARTH DRILLING MINING