TREA

Stahl- und Apparatebau Hans Leffer GmbH

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  • Saarbrucken-Dudweiler, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Elevator for casing
    • Patent number 4,441,749
    • Issue date Apr 10, 1984
    • Stahl- und Apparatebau Hans Leffer GmbH
    • Kurt Blaschke
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Pile extraction apparatus
    • Patent number 4,248,550
    • Issue date Feb 3, 1981
    • Stahl- und Apparatebau Hans Leffer GmbH
    • Kurt Blaschke
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Method and apparatus for sinking a cased borehole for producing cas...
    • Patent number 4,202,416
    • Issue date May 13, 1980
    • Stahl- und Apparatebau Hans Leffer GmbH
    • Kurt Blaschke
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rotary boring head
    • Patent number 4,193,462
    • Issue date Mar 18, 1980
    • Stahl- und Apparatebau Hans Leffer GmbH
    • Kurt Blaschke
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

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