Yoshio Sumiya

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Condenser for a steam turbine and a method of operating such a cond...
- Patent number 5,423,377
- Issue date Jun 13, 1995
- Hitachi, Ltd.
- Kazuya Iwata
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Apparatus for collecting cleaning bodies for tubular heat exchanger
- Patent number 5,251,690
- Issue date Oct 12, 1993
- Hitachi, Ltd.
- Katsumoto Otake
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Device for cleaning inner surfaces of heat exchanger tubes
- Patent number 4,917,176
- Issue date Apr 17, 1990
- Hitachi, Ltd.
- Toshimasa Shimada
- F28 - HEAT EXCHANGE IN GENERAL