Yoshiyasu Watanabe

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Protective relay apparatus
- Patent number 6,683,769
- Issue date Jan 27, 2004
- Hitachi, Ltd.
- Daisuke Maeda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Protective relay apparatus
- Patent number 6,678,136
- Issue date Jan 13, 2004
- Hitachi, Ltd.
- Daisuke Maeda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Vacuum switchgear
- Patent number 6,268,579
- Issue date Jul 31, 2001
- Hitachi, Ltd.
- Satoru Kajiwara
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Protection system for power receiving station
- Patent number 5,892,645
- Issue date Apr 6, 1999
- Hitachi, Ltd.
- Yoshiyasu Watanabe
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Protective relay apparatus
- Publication number 20030072114
- Publication date Apr 17, 2003
- Hitachi,Ltd.
- Daisuke Maeda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Protective relay apparatus
- Publication number 20020159211
- Publication date Oct 31, 2002
- Daisuke Maeda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Vacuum switch and vacuum switchgear using the same
- Publication number 20020043515
- Publication date Apr 18, 2002
- Satoru Kajiwara
- H01 - BASIC ELECTRIC ELEMENTS