Hiroshi Kumon

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Hiroshima, JA

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Patents Grantslast 30 patents

Information Patent Grant
Sintering method for making a high carbon ferrous sliding element
- Patent number 4,042,385
- Issue date Aug 16, 1977
- Toyo Kogyo Co., Ltd.
- Kenji Miyake
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method of making a composite metal casting
- Patent number 4,023,613
- Issue date May 17, 1977
- Toyo Kogyo Co., Ltd.
- Yositaka Uebayasi
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Metal made of steel plate and aluminum material
- Patent number 4,005,991
- Issue date Feb 1, 1977
- Toyo Kogyo Co., Ltd.
- Yositaka Uebayasi
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...