Ernst Gebehart

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Bochum, DT

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for preventing cave-ins of excavations
- Patent number 3,949,562
- Issue date Apr 13, 1976
- Bochumer Eisenhutte Heintzmann & Co.
- Gunter Blumenthal
- E21 - EARTH DRILLING MINING