Welldone Engineering GmbH

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Beedenbostel, DE

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Information Patent Grant
Apparatus for the transmission of information in a drill string
- Patent number 5,806,612
- Issue date Sep 15, 1998
- DMT-Gesellschaft Fur Forschung Und Prufung MBH
- Werner Vorhoff
- E21 - EARTH DRILLING MINING

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