Katsumi Ishikawa

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
Semiconductor drive circuit and power conversion apparatus using same
- Patent number 8,928,363
- Issue date Jan 6, 2015
- Hitachi, Ltd.
- Ayumu Hatanaka
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Power converter
- Patent number 8,860,213
- Issue date Oct 14, 2014
- Hitachi, Ltd.
- Tsutomu Kominami
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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
Driver circuit for switching device
- Patent number 8,508,258
- Issue date Aug 13, 2013
- Hitachi, Ltd.
- Katsumi Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
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
Drive circuit for power semiconductor switching device
- Patent number 7,994,826
- Issue date Aug 9, 2011
- Hitachi, Ltd.
- Katsumi Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Inverter system and vehicle
- Patent number 7,954,334
- Issue date Jun 7, 2011
- Hitachi, Ltd.
- Masataka Sasaki
- B60 - VEHICLES IN GENERAL
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
MRI apparatus with high-resistance magnet
- Patent number 7,847,555
- Issue date Dec 7, 2010
- Hitachi, Ltd.
- Matahiro Komuro
- G01 - MEASURING TESTING
Information Patent Grant
Low loss magnet and magnetic circuit using the same
- Patent number 7,806,991
- Issue date Oct 5, 2010
- Hitachi, Ltd.
- Matahiro Komuro
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Hybrid cruising control system
- Patent number 7,783,396
- Issue date Aug 24, 2010
- Hitachi, Ltd.
- Hiroshi Arita
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Drive circuit for switching device
- Patent number 7,746,614
- Issue date Jun 29, 2010
- Hitachi, Ltd.
- Katsumi Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
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
Information Patent Grant
Driving circuit for switching elements
- Patent number 7,696,650
- Issue date Apr 13, 2010
- Hitachi, Ltd.
- Katsumi Ishikawa
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Protection circuit for power management semiconductor devices and p...
- Patent number 7,675,727
- Issue date Mar 9, 2010
- Hitachi, Ltd.
- Masataka Sasaki
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Power semiconductor module
- Patent number 7,671,465
- Issue date Mar 2, 2010
- Hitachi, Ltd.
- Sunao Funakoshi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gate driver circuit for switching device
- Patent number 7,570,085
- Issue date Aug 4, 2009
- Hitachi, Ltd.
- Katsumi Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Inverter apparatus
- Patent number 7,564,294
- Issue date Jul 21, 2009
- Hitachi, Ltd.
- Katsumi Ishikawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Power semiconductor module
- Patent number 7,547,966
- Issue date Jun 16, 2009
- Hitachi, Ltd.
- Sunao Funakoshi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Drive circuit for switching device
- Patent number 7,483,250
- Issue date Jan 27, 2009
- Hitachi, Ltd.
- Katsumi Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
MRI apparatus with high-resistance magnet
- Patent number 7,352,184
- Issue date Apr 1, 2008
- Hitachi, Ltd.
- Matahiro Komuro
- G01 - MEASURING TESTING
Information Patent Grant
Inverter apparatus
- Patent number 7,336,118
- Issue date Feb 26, 2008
- Hitachi, Ltd.
- Katsumi Ishikawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

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
Semiconductor Drive Circuit and Power Conversion Apparatus Using Same
- Publication number 20140191784
- Publication date Jul 10, 2014
- Hitachi, Ltd
- Ayumu Hatanaka
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
POWER CONVERTER
- Publication number 20140042611
- Publication date Feb 13, 2014
- Hitachi, Ltd
- Tsutomu KOMINAMI
- H01 - BASIC ELECTRIC ELEMENTS
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
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
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
Information Patent Application
Power Semiconductor Module
- Publication number 20090321924
- Publication date Dec 31, 2009
- Hitachi, Ltd
- Sunao Funakoshi
- H01 - BASIC ELECTRIC ELEMENTS
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
Drive Circuit for Switching Device
- Publication number 20090128974
- Publication date May 21, 2009
- Hitachi, Ltd
- Katsumi Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
METHOD FOR POWER SEMICONDUCTOR MODULE FABRICATION, ITS APPARATUS, P...
- Publication number 20090116197
- Publication date May 7, 2009
- Sunao Funakoshi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
DRIVING CIRCUIT FOR SWITCHING ELEMENTS
- Publication number 20080315938
- Publication date Dec 25, 2008
- Katsumi Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
SEMICONDUCTOR CIRCUIT
- Publication number 20080284482
- Publication date Nov 20, 2008
- Hitachi, Ltd.
- Katsumi Ishikawa
- 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
Power Semiconductor Module
- Publication number 20080224303
- Publication date Sep 18, 2008
- Sunao Funakoshi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Hybrid Cruising Control System
- Publication number 20080183348
- Publication date Jul 31, 2008
- HITACHI, LTD.
- Hiroshi ARITA
- B60 - VEHICLES IN GENERAL
Information Patent Application
MRI Apparatus With High-Resistance Magnet
- Publication number 20080171216
- Publication date Jul 17, 2008
- Matahiro Komuro
- G01 - MEASURING TESTING
Information Patent Application
Gate Drive Circuit
- Publication number 20080122497
- Publication date May 29, 2008
- HITACHI, LTD.
- Katsumi ISHIKAWA
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Inverter Apparatus
- Publication number 20080106320
- Publication date May 8, 2008
- HITACHI, LTD.
- Katsumi Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Protection circuit for power management semiconductor devices and p...
- Publication number 20080074819
- Publication date Mar 27, 2008
- Hitachi, Ltd
- Masataka Sasaki
- B60 - VEHICLES IN GENERAL
Information Patent Application
Driver circuit for switching device
- Publication number 20070221994
- Publication date Sep 27, 2007
- Katsumi Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Power semiconductor module
- Publication number 20070216013
- Publication date Sep 20, 2007
- Sunao Funakoshi
- H01 - BASIC ELECTRIC ELEMENTS

Katsumi Ishikawa

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...

Semiconductor drive circuit and power conversion apparatus using same

Power converter

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

Power converter

Power converter and motor driving device using the same

Driver circuit for switching device

Drive circuit of semiconductor device

Power semiconductor apparatus having a silicon power semiconductor...

Drive circuit for switching device

Switching circuit and power converter

Drive circuit for power semiconductor switching device

Inverter system and vehicle

Circuit arrangement having a free-wheel diode

MRI apparatus with high-resistance magnet

Low loss magnet and magnetic circuit using the same

Hybrid cruising control system

Drive circuit for switching device

Gate drive circuit with reduced switching loss and noise

Driving circuit for switching elements

Protection circuit for power management semiconductor devices and p...

Power semiconductor module

Gate driver circuit for switching device

Inverter apparatus

Power semiconductor module

Drive circuit for switching device

MRI apparatus with high-resistance magnet

Inverter apparatus

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

Semiconductor Drive Circuit and Power Conversion Apparatus Using Same

POWER CONVERTER

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

POWER CONVERTER FOR TRACTION CONTROL AND TRANSPORTATION SYSTEM

DRIVE CIRCUIT OF SEMICONDUCTOR DEVICE

POWER SEMICONDUCTOR APPARATUS

SWITCHING CIRCUIT AND POWER CONVERTER

Power Semiconductor Module

CIRCUIT DEVICE HAVING A FREE WHEELING DIODE, CIRCUIT DEVICE AND POW...

Drive Circuit for Switching Device

METHOD FOR POWER SEMICONDUCTOR MODULE FABRICATION, ITS APPARATUS, P...

DRIVING CIRCUIT FOR SWITCHING ELEMENTS

SEMICONDUCTOR CIRCUIT

CIRCUIT ARRANGEMENT HAVING A FREE-WHEEL DIODE

Power Semiconductor Module

Hybrid Cruising Control System

MRI Apparatus With High-Resistance Magnet

Gate Drive Circuit

Inverter Apparatus

Protection circuit for power management semiconductor devices and p...

Driver circuit for switching device

Power semiconductor module