Hirotake Usui

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Cylinder liner and cylinder block and method for producing the cyli...
- Patent number 5,727,511
- Issue date Mar 17, 1998
- Ryobi Ltd.
- Hiroyuki Omura
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Casting device for producing closed deck type cylinder block and sa...
- Patent number 5,720,334
- Issue date Feb 24, 1998
- Ryobi Ltd.
- Hirotake Usui
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Molten metal supply device
- Patent number 5,700,422
- Issue date Dec 23, 1997
- Ryobi Ltd.
- Hirotake Usui
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Laminar flow injection molding apparatus and laminar flow injection...
- Patent number 5,361,826
- Issue date Nov 8, 1994
- Ryobi Ltd.
- Noriyoshi Yamauchi
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Metal mold arrangement for casting water-cooled type cylinder block...
- Patent number 5,323,840
- Issue date Jun 28, 1994
- Ryobi Ltd.
- Hirotake Usui
- B22 - CASTING POWDER METALLURGY