Shigeo Nakagima

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus on drum shearer for cutting through safety wall in long w...
- Patent number 4,266,828
- Issue date May 12, 1981
- Taiheiyo Engineering Inc.
- Shigeo Nakagima
- E21 - EARTH DRILLING MINING
Information Patent Grant
Safety wall cutting through method employed in long wall mining
- Patent number 4,196,933
- Issue date Apr 8, 1980
- Taiheiyo Engineering Inc.
- Shigeo Nakagima
- E21 - EARTH DRILLING MINING