Kazutoshi Ogawa

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Three-phase AC motor drive device, rail vehicle equipped with same,...
- Patent number 11,701,971
- Issue date Jul 18, 2023
- Hitachi, Ltd.
- Takeshi Shinomiya
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Power semiconductor with a Si chip and a wideband chip having match...
- Patent number 9,171,831
- Issue date Oct 27, 2015
- Hitachi, Ltd.
- Katsumi Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Power conversion device and temperature rise calculation method the...
- Patent number 8,952,642
- Issue date Feb 10, 2015
- Hitachi, Ltd.
- Hideki Ayano
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Power semiconductor with a Si chip and a wideband chip having match...
- Patent number 8,860,170
- Issue date Oct 14, 2014
- Hitachi, Ltd.
- Katsumi Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Power converter
- Patent number 8,829,838
- Issue date Sep 9, 2014
- Hitachi, Ltd.
- Hideki Ayano
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Power converter and motor driving device using the same
- Patent number 8,619,448
- Issue date Dec 31, 2013
- Hitachi, Ltd.
- Kazutoshi Ogawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Drive circuit of semiconductor device
- Patent number 8,471,622
- Issue date Jun 25, 2013
- Hitachi, Ltd.
- Katsumi Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Power semiconductor apparatus having a silicon power semiconductor...
- Patent number 8,441,075
- Issue date May 14, 2013
- Hitachi, Ltd.
- Katsumi Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Drive circuit for switching device
- Patent number 8,395,422
- Issue date Mar 12, 2013
- Hitachi, Ltd.
- Kazutoshi Ogawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Switching circuit and power converter
- Patent number 8,110,944
- Issue date Feb 7, 2012
- Hitachi, Ltd.
- Kazutoshi Ogawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Automatic circuit adjusting system and circuit adjusting tool therefor
- Patent number 4,819,178
- Issue date Apr 4, 1989
- Sony Corporation
- Shigeo Isayama
- G05 - CONTROLLING REGULATING

Patents Applicationslast 30 patents

Information Patent Application
Three-Phase AC Motor Drive Device, Rail Vehicle Equipped With Same,...
- Publication number 20220234450
- Publication date Jul 28, 2022
- Hitachi, Ltd
- Takeshi SHINOMIYA
- B60 - VEHICLES IN GENERAL
Information Patent Application
Drive Circuit of Semiconductor Switching Element and Power Conversi...
- Publication number 20150003133
- Publication date Jan 1, 2015
- Hitach, Ltd.
- Kazutoshi Ogawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
POWER SEMICONDUCTOR WITH A SI CHIP AND A WIDEBAND CHIP HAVING MATCH...
- Publication number 20140374794
- Publication date Dec 25, 2014
- Katsumi Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Inverter Device
- Publication number 20140334214
- Publication date Nov 13, 2014
- Kaoru Katoh
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
POWER SEMICONDUCTOR APPARATUS
- Publication number 20130214328
- Publication date Aug 22, 2013
- Hitachi, Ltd
- Katsumi ISHIKAWA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Power Conversion Device and Temperature Rise Calculation Method The...
- Publication number 20130119912
- Publication date May 16, 2013
- Hitachi Ltd.
- Hideki Ayano
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Power Converter
- Publication number 20130015799
- Publication date Jan 17, 2013
- HITACHI LTD
- Hideki Ayano
- B60 - VEHICLES IN GENERAL
Information Patent Application
POWER CONVERTER AND MOTOR DRIVING DEVICE USING THE SAME
- Publication number 20120007533
- Publication date Jan 12, 2012
- Kazutoshi OGAWA
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
DRIVE CIRCUIT FOR SWITCHING DEVICE
- Publication number 20110080192
- Publication date Apr 7, 2011
- Kazutoshi Ogawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
DRIVE CIRCUIT OF SEMICONDUCTOR DEVICE
- Publication number 20100265746
- Publication date Oct 21, 2010
- Hitachi, Ltd.
- Katsumi ISHIKAWA
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
POWER SEMICONDUCTOR APPARATUS
- Publication number 20100244092
- Publication date Sep 30, 2010
- Hitachi, Ltd.
- Katsumi ISHIKAWA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SWITCHING CIRCUIT AND POWER CONVERTER
- Publication number 20100207450
- Publication date Aug 19, 2010
- Kazutoshi OGAWA
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC

Kazutoshi Ogawa

Person

Patents Grantslast 30 patents

Three-phase AC motor drive device, rail vehicle equipped with same,...

Power semiconductor with a Si chip and a wideband chip having match...

Power conversion device and temperature rise calculation method the...

Power semiconductor with a Si chip and a wideband chip having match...

Power converter

Power converter and motor driving device using the same

Drive circuit of semiconductor device

Power semiconductor apparatus having a silicon power semiconductor...

Drive circuit for switching device

Switching circuit and power converter

Automatic circuit adjusting system and circuit adjusting tool therefor

Patents Applicationslast 30 patents

Three-Phase AC Motor Drive Device, Rail Vehicle Equipped With Same,...

Drive Circuit of Semiconductor Switching Element and Power Conversi...

POWER SEMICONDUCTOR WITH A SI CHIP AND A WIDEBAND CHIP HAVING MATCH...

Inverter Device

POWER SEMICONDUCTOR APPARATUS

Power Conversion Device and Temperature Rise Calculation Method The...

Power Converter

POWER CONVERTER AND MOTOR DRIVING DEVICE USING THE SAME

DRIVE CIRCUIT FOR SWITCHING DEVICE

DRIVE CIRCUIT OF SEMICONDUCTOR DEVICE

POWER SEMICONDUCTOR APPARATUS

SWITCHING CIRCUIT AND POWER CONVERTER