TREA

Walter Littmann

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  • Aerzen-Grupenhagen, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ultrasonic annular core bit
    • Patent number 6,948,574
    • Issue date Sep 27, 2005
    • Hilti Aktiengesellschaft
    • Till Cramer
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Device with ultrasound adapter
    • Patent number 6,731,047
    • Issue date May 4, 2004
    • Hilti Aktiengesellschaft
    • Adrian Kauf
    • B28 - WORKING CEMENT, CLAY, OR STONE

Patents Applicationslast 30 patents

  • Information Patent Application

    Ultrasonic annular core bit
    • Publication number 20030146024
    • Publication date Aug 7, 2003
    • Till Cramer
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Application

    Device with ultrasound adapter
    • Publication number 20030001456
    • Publication date Jan 2, 2003
    • Adrian Kauf
    • B28 - WORKING CEMENT, CLAY, OR STONE