Tsunemi Wada

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for manufacturing a high strength rail with good toughness
- Patent number 4,933,024
- Issue date Jun 12, 1990
- NKK Corporation
- Kozo Fukuda
- C21 - METALLURGY OF IRON
Information Patent Grant
Method for heat-treating steel rail head
- Patent number 4,886,558
- Issue date Dec 12, 1989
- NKK Corporation
- Toyokazu Teramoto
- C21 - METALLURGY OF IRON
Information Patent Grant
Wear resistant rails having capability of preventing propagation of...
- Patent number 4,767,475
- Issue date Aug 30, 1988
- Nippon Kokan Kabushiki Kaisha
- Kozo Fukuda
- C21 - METALLURGY OF IRON