Hiroshi Ito

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Dazaifu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for hardfacing a ferrous base material
- Patent number 4,478,871
- Issue date Oct 23, 1984
- Nippon Tungsten Co., Ltd.
- Shigeya Sakaguchi
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method for manufacturing a mechanical seal ring
- Patent number 4,280,841
- Issue date Jul 28, 1981
- Nippon Tungsten Co., Ltd.
- Hiroshi Ito
- B22 - CASTING POWDER METALLURGY