Shigeo Nakajima

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Tokyo, JA

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for protecting of coal mine workers
- Patent number 4,067,618
- Issue date Jan 10, 1978
- Taiheiyo Engineering Inc.
- Shigeo Nakajima
- E21 - EARTH DRILLING MINING
Information Patent Grant
Longwall coal mining machine with plural cutters on sub-ranging arm
- Patent number 4,027,918
- Issue date Jun 7, 1977
- Taiheiyo Engineering Incorporated
- Masao Hujimori
- E21 - EARTH DRILLING MINING
Information Patent Grant
Self-advancing support for use in the pit of coal or metal mine
- Patent number 4,002,037
- Issue date Jan 11, 1977
- Taiiheiyo Engineering Incorporated
- Masao Hujimori
- E21 - EARTH DRILLING MINING