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Stefan Keller

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  • Bonn, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Aluminum composite material and forming method
    • Patent number 10,279,385
    • Issue date May 7, 2019
    • Hydro Aluminium Rolled Products GmbH
    • Henk-Jan Brinkman
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Aluminium composite material and forming method
    • Patent number 9,855,592
    • Issue date Jan 2, 2018
    • Hydro Aluminium Rolled Products GmbH
    • Henk-Jan Brinkman
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents