Extensions of the base member supporting the conveyor

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Patents Grantslast 30 patents

Information Patent Grant
Mining apparatus and method
- Patent number 4,082,360
- Issue date Apr 4, 1978
- Peabody Coal Company
- John A. L. Campbell
- E21 - EARTH DRILLING MINING
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
Information Patent Grant
3915500
- Patent number 3,915,500
- Issue date Oct 28, 1975
- E21 - EARTH DRILLING MINING
Information Patent Grant
3896626
- Patent number 3,896,626
- Issue date Jul 29, 1975
- E21 - EARTH DRILLING MINING
Information Patent Grant
3874734
- Patent number 3,874,734
- Issue date Apr 1, 1975
- E21 - EARTH DRILLING MINING
Information Patent Grant
3842966
- Patent number 3,842,966
- Issue date Oct 22, 1974
- E21 - EARTH DRILLING MINING
Information Patent Grant
3739586
- Patent number 3,739,586
- Issue date Jun 19, 1973
- E21 - EARTH DRILLING MINING
Information Patent Grant
3471201
- Patent number 3,471,201
- Issue date Oct 7, 1969
- E21 - EARTH DRILLING MINING
Information Patent Grant
3357742
- Patent number 3,357,742
- Issue date Dec 12, 1967
- E21 - EARTH DRILLING MINING