Roy L. Bell

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Burton-on-Trent, GB

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Patents Grantslast 30 patents

Information Patent Grant
Equipment for laying a layer of elongate material adjacent to an ex...
- Patent number 4,339,216
- Issue date Jul 13, 1982
- Coal Industry (Patents) Limited
- Roy L. Bell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Equipment for laying a layer of elongate material
- Patent number 4,230,371
- Issue date Oct 28, 1980
- Coal Industry Limited
- Roy L. Bell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Cowl arrangements for mining machines
- Patent number 4,229,043
- Issue date Oct 21, 1980
- Coal Industry (Patents) Limited
- Roy L. Bell
- E21 - EARTH DRILLING MINING