Helmut Palm

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Dortmund, DE

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Patents Grantslast 30 patents

Information Patent Grant
Telemetry method for cable-drilled boreholes and method for carryin...
- Patent number 5,560,437
- Issue date Oct 1, 1996
- Bergwerksverband GmbH
- Udo Dickel
- E21 - EARTH DRILLING MINING