Burckhardt Elsner

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Patents Grantslast 30 patents

Information Patent Grant
Shield-type support assemblies for mine workings
- Patent number 4,075,857
- Issue date Feb 28, 1978
- Gewerkschaft Eisenhutte Westfalia
- Burckhardt Elsner
- E21 - EARTH DRILLING MINING
Information Patent Grant
Support assemblies for use in mine workings
- Patent number 4,048,804
- Issue date Sep 20, 1977
- Gewerkschaft Eisenhutte Westfalia
- Burckhardt Elsner
- E21 - EARTH DRILLING MINING