TREA

Alfred Maykemper

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  • Wuppertal, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Mine-roof support
    • Patent number 4,380,410
    • Issue date Apr 19, 1983
    • Hermann Hemscheidt Maschinenfabrik GmbH & Co.
    • Hans Bull
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Roof-support distancing apparatus
    • Patent number 4,330,226
    • Issue date May 18, 1982
    • Herman Hemscheidt Maschinenfabrik GmbH & Co.
    • Josef Welzel
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic shield-type support
    • Patent number 4,313,698
    • Issue date Feb 2, 1982
    • Hermann Hemscheidt Maschinenfabrik GmbH & Co.
    • Alfred Maykemper
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic roof-support frame
    • Patent number 4,266,892
    • Issue date May 12, 1981
    • Hermann Hemscheidt Maschinenfabrik GmbH & Co.
    • Alfred Maykemper
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Walking mine-roof support
    • Patent number 4,189,258
    • Issue date Feb 19, 1980
    • Hermann Hemscheidt Maschinenfabrik GmbH & Co.
    • Alfred Maykemper
    • E21 - EARTH DRILLING MINING