comprising three walking elements

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Patents Grantslast 30 patents

Information Patent Grant
Mine roof support assembly
- Patent number 4,526,495
- Issue date Jul 2, 1985
- Gewerkschaft Eisenhutte Westfalia
- Kunibert Becker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for supporting the roof of an underground mine...
- Patent number 4,099,785
- Issue date Jul 11, 1978
- Karl Maria Groetschel
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine roof support assemblies
- Patent number 4,073,151
- Issue date Feb 14, 1978
- Gewerkschaft Eisenhutte Westfalia
- Gunter Harmsma
- E21 - EARTH DRILLING MINING
Information Patent Grant
3490243
- Patent number 3,490,243
- Issue date Jan 20, 1970
- E21 - EARTH DRILLING MINING