Yasutaka Sonobe

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Directional ground relay system
- Patent number 7,106,565
- Issue date Sep 12, 2006
- Kabushiki Kaisha Toshiba
- Takahiro Kase
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Digital directional relay
- Patent number 6,989,977
- Issue date Jan 24, 2006
- Kabushiki Kaisha Toshiba
- Takahiro Kase
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Directional comparison distance relay system
- Patent number 6,937,453
- Issue date Aug 30, 2005
- Kabushiki Kaisha Toshiba
- Takahiro Kase
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Protective relay system
- Patent number 6,873,508
- Issue date Mar 29, 2005
- Kabushiki Kaisha Toshiba
- Takahiro Kase
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Directional ground relay system
- Publication number 20040057178
- Publication date Mar 25, 2004
- Kabushiki Kaisha Toshiba
- Takahiro Kase
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Directional comparison distance relay system
- Publication number 20030151867
- Publication date Aug 14, 2003
- Kabushiki Kaisha Toshiba
- Takahiro Kase
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Protective relay system
- Publication number 20030039086
- Publication date Feb 27, 2003
- Takahiro Kase
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER