Hans-Jurgen Kahl

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Wuppertal, DE

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Patents Grantslast 30 patents

Information Patent Grant
Walking mine-roof support
- Patent number 4,189,258
- Issue date Feb 19, 1980
- Hermann Hemscheidt Maschinenfabrik GmbH & Co.
- Alfred Maykemper
- E21 - EARTH DRILLING MINING