Shin Ishihara

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Kasukabe, JP

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Patents Grantslast 30 patents

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
Information Patent Grant
Hermetic rotary compressor with balancing weights
- Patent number 4,915,554
- Issue date Apr 10, 1990
- Hitachi, Ltd.
- Yukio Serizawa
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...