TREA

Hans Zingl

Follow

Person

  • Dallas, TX, US
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Drill pipe handling mechanism
    • Patent number 4,194,419
    • Issue date Mar 25, 1980
    • Cooper Industries, Inc.
    • Ray M. Mitchhart
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Drill pipe handling mechanism
    • Patent number 4,128,135
    • Issue date Dec 5, 1978
    • Gardner-Denver Company
    • Ray M. Mitchhart
    • E21 - EARTH DRILLING MINING