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Becorit Grubenausbau GmbH
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Recklinghausen, DT
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Patents Grants
last 30 patents
Information
Patent Grant
Roof bar for surface support elements
Patent number
4,092,831
Issue date
Jun 6, 1978
Becorit Grubenausbau GmbH
Walter Lubojatsky
E21 - EARTH DRILLING MINING
Information
Patent Grant
Mine roof support
Patent number
3,996,753
Issue date
Dec 14, 1976
Becorit Grubenausbau GmbH
Walter Lubojatsky
E21 - EARTH DRILLING MINING
Information
Patent Grant
Mine support assemblies
Patent number
3,971,225
Issue date
Jul 27, 1976
Becorit Grubenausbau GmbH
Wilhelm Wertelewski
E21 - EARTH DRILLING MINING
Information
Patent Grant
Mine roof support
Patent number
3,932,998
Issue date
Jan 20, 1976
Becorit Grubenausbau GmbH
Walter Lubojatsky
E21 - EARTH DRILLING MINING