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Ernst-G/u/ nter Nerlich

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  • Essen, DE
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  • Information Patent Grant

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    • Patent number 4,487,531
    • Issue date Dec 11, 1984
    • Bochumer Eisenh/u/ tte Heintzmann GmbH & Co. KG
    • Ernst-G/u/ nter Nerlich
    • E21 - EARTH DRILLING MINING