Michael Etherington

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Retford, GB

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Patents Grantslast 30 patents

Information Patent Grant
Mining machinery
- Patent number 4,746,170
- Issue date May 24, 1988
- Dosco Overseas Engineering Limited
- Michael Etherington
- E21 - EARTH DRILLING MINING
Information Patent Grant
Tunnel profile control
- Patent number 4,285,546
- Issue date Aug 25, 1981
- Dosco Overseas Engineering Ltd.
- Michael Etherington
- E21 - EARTH DRILLING MINING