Dai Tsugawa

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Mito, JP

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Patents Grantslast 30 patents

Information Patent Grant
Circuit arrangement having a free-wheel diode
- Patent number 7,880,174
- Issue date Feb 1, 2011
- Hitachi, Ltd.
- Haruka Shimizu
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gate drive circuit with reduced switching loss and noise
- Patent number 7,737,761
- Issue date Jun 15, 2010
- Hitachi, Ltd.
- Katsumi Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
POWER CONVERTER FOR TRACTION CONTROL AND TRANSPORTATION SYSTEM
- Publication number 20100327837
- Publication date Dec 30, 2010
- Hitachi, Ltd.
- Dai TSUGAWA
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
CIRCUIT DEVICE HAVING A FREE WHEELING DIODE, CIRCUIT DEVICE AND POW...
- Publication number 20090168471
- Publication date Jul 2, 2009
- Dai Tsugawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
CIRCUIT ARRANGEMENT HAVING A FREE-WHEEL DIODE
- Publication number 20080258252
- Publication date Oct 23, 2008
- Haruka Shimizu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Gate Drive Circuit
- Publication number 20080122497
- Publication date May 29, 2008
- HITACHI, LTD.
- Katsumi ISHIKAWA
- H03 - BASIC ELECTRONIC CIRCUITRY