TREA

Clifford K. Logan Jr.

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  • Hickory, NC, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Reciprocating drill bit
    • Patent number 4,354,561
    • Issue date Oct 19, 1982
    • Haney; Bell Charles
    • Clifford K. Logan
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rotary drill bit
    • Patent number 4,324,300
    • Issue date Apr 13, 1982
    • Clifford K. Logan
    • E21 - EARTH DRILLING MINING