John B. Norris

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Leeds, GB

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Patents Grantslast 30 patents

Information Patent Grant
Breaking apparatus for use with a conveyor
- Patent number 4,125,227
- Issue date Nov 14, 1978
- Dresser Europe S.A.
- George A. Parrott
- E21 - EARTH DRILLING MINING
Information Patent Grant
Auxiliary device for a mining machine
- Patent number 4,123,110
- Issue date Oct 31, 1978
- Dresser Europe S.A.
- George A. Parrott
- E21 - EARTH DRILLING MINING