Yusaku Nakagawa

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Compressor scroll made of silicon containing aluminum alloy
- Patent number 5,478,220
- Issue date Dec 26, 1995
- Hitachi, Ltd.
- Yasuo Kamitsuma
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Highly ductile sintered aluminum alloy, method for production there...
- Patent number 5,387,272
- Issue date Feb 7, 1995
- Hitachi, Ltd.
- Yasuo Kamitsuma
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method of manufacturing sintered aluminum alloy parts
- Patent number 5,346,667
- Issue date Sep 13, 1994
- Hitachi, Ltd.
- Yasuo Kamitsuma
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Sliding structure such as compressor or the like
- Patent number 5,087,181
- Issue date Feb 11, 1992
- Hitachi, Ltd.
- Yasuo Kamitsuma
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Rotary compressor having oxidizing and nitriding surface treatment
- Patent number 4,944,663
- Issue date Jul 31, 1990
- Hitachi, Ltd.
- Tadashi Iizuka
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES