Masahiro Nagasu

Person

Hitachinaka-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Power converter and power converter of rolling stock
- Patent number 8,963,456
- Issue date Feb 24, 2015
- Hitachi, Ltd.
- Tetsu Sugiura
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Drive device for railway vehicle
- Patent number 8,924,051
- Issue date Dec 30, 2014
- Hitachi, Ltd.
- Daijiro Araki
- B60 - VEHICLES IN GENERAL
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
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
Control apparatus of power conversion system
- Patent number 7,965,056
- Issue date Jun 21, 2011
- Hitachi, Ltd.
- Mutsuhiro Terunuma
- 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
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
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
Information transmission system and information transmission method
- Patent number 7,577,668
- Issue date Aug 18, 2009
- Hitachi, Ltd.
- Yutaka Sato
- B60 - VEHICLES IN GENERAL
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
Fault detection system
- Patent number 7,046,155
- Issue date May 16, 2006
- Hitachi, Ltd.
- Yutaka Sato
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Fault detection system
- Patent number 6,759,964
- Issue date Jul 6, 2004
- Hitachi, Ltd.
- Yutaka Sato
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Fault detection system
- Patent number 6,724,313
- Issue date Apr 20, 2004
- Hitachi, Ltd.
- Yutaka Sato
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Railway vehicle operation-control system and a railway vehicle usin...
- Patent number 6,600,978
- Issue date Jul 29, 2003
- Hitachi, Ltd.
- Masahiro Nagasu
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Flat semiconductor device and power converter employing the same
- Patent number 6,452,261
- Issue date Sep 17, 2002
- Hitachi, Ltd.
- Hironori Kodama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor circuit preventing electromagnetic noise
- Patent number 6,414,370
- Issue date Jul 2, 2002
- Hitachi, Ltd.
- Masahiro Nagasu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Semiconductor power converting apparatus
- Patent number 6,380,796
- Issue date Apr 30, 2002
- Hitachi, Ltd.
- Hiromitsu Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electric power converting system with integrator providing output i...
- Patent number 6,304,472
- Issue date Oct 16, 2001
- Hitachi, Ltd.
- Masahiro Nagasu
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gate drive circuit of voltage drive switching element
- Patent number 6,271,709
- Issue date Aug 7, 2001
- Hitachi, Ltd.
- Shin Kimura
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Semiconductor power converting apparatus
- Patent number 6,242,968
- Issue date Jun 5, 2001
- Hitachi, Ltd.
- Hiromitsu Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Semiconductor circuit and semiconductor device for use in equipment...
- Patent number 6,204,717
- Issue date Mar 20, 2001
- Hitachi, Ltd.
- Masahiro Nagasu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Inverter apparatus having improved switching element
- Patent number 5,962,877
- Issue date Oct 5, 1999
- Hitachi, Ltd.
- Naoki Sakurai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor device and inverter apparatus using the semiconductor...
- Patent number 5,877,518
- Issue date Mar 2, 1999
- Hitachi, Ltd.
- Naoki Sakurai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Diode and power converting apparatus
- Patent number 5,859,446
- Issue date Jan 12, 1999
- Hitachi, Ltd.
- Masahiro Nagasu
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor thyristor switching device and power converter using...
- Patent number 5,831,293
- Issue date Nov 3, 1998
- Hitachi, Ltd.
- Tetsuo Mizoguchi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Compound semiconductor device controlled by MIS gate, driving metho...
- Patent number 5,767,555
- Issue date Jun 16, 1998
- Hitachi, Ltd.
- Junichi Sakano
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
DRIVE DEVICE FOR RAILWAY VEHICLE
- Publication number 20130073125
- Publication date Mar 21, 2013
- Daijiro Araki
- B60 - VEHICLES IN GENERAL
Information Patent Application
POWER CONVERTER AND POWER CONVERTER OF ROLLING STOCK
- Publication number 20120229055
- Publication date Sep 13, 2012
- Tetsu SUGIURA
- B60 - VEHICLES IN GENERAL
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
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
CONTROL APPARATUS OF POWER CONVERSION SYSTEM
- Publication number 20080266920
- Publication date Oct 30, 2008
- Hitachi, Ltd.
- Mutsuhiro Terunuma
- B60 - VEHICLES IN GENERAL
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
Hybrid Cruising Control System
- Publication number 20080183348
- Publication date Jul 31, 2008
- HITACHI, LTD.
- Hiroshi ARITA
- B60 - VEHICLES IN GENERAL
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
DRIVE CIRCUIT FOR POWER SEMICONDUCTOR SWITCHING DEVICE
- Publication number 20070200602
- Publication date Aug 30, 2007
- Katsumi Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
GATE DRIVER CIRCUIT FOR SWITCHING DEVICE
- Publication number 20070200613
- Publication date Aug 30, 2007
- Katsumi Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Fault detection system
- Publication number 20040221217
- Publication date Nov 4, 2004
- Hitachi, Ltd
- Yutaka Sato
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Information transmission system and information transmission method
- Publication number 20040103113
- Publication date May 27, 2004
- Yutaka Sato
- B60 - VEHICLES IN GENERAL
Information Patent Application
Semiconductor circuit, method of driving the same and semiconductor...
- Publication number 20040056702
- Publication date Mar 25, 2004
- Masahiro Nagasu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Fault detection system
- Publication number 20030076233
- Publication date Apr 24, 2003
- Hitachi, Ltd
- Yutaka Sato
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Fault detection system
- Publication number 20030076232
- Publication date Apr 24, 2003
- Hitachi, Ltd.
- Yutaka Sato
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Railway vehicle operation-control system and a railway vehicle usin...
- Publication number 20020161490
- Publication date Oct 31, 2002
- Hitachi, Ltd.
- Masahiro Nagasu
- B60 - VEHICLES IN GENERAL
Information Patent Application
Flat semiconductor device and power converter employing the same
- Publication number 20020145188
- Publication date Oct 10, 2002
- Hironori Kodama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Semiconductor circuit, method of driving the same and semiconductor...
- Publication number 20020125548
- Publication date Sep 12, 2002
- Masahiro Nagasu
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Support system and method for recovering a train, and information t...
- Publication number 20020062182
- Publication date May 23, 2002
- Yutaka Sato
- B61 - RAILWAYS
Information Patent Application
Semiconductor power converting apparatus
- Publication number 20010015670
- Publication date Aug 23, 2001
- Hitachi, Ltd.
- Hiromitsu Sakai
- H03 - BASIC ELECTRONIC CIRCUITRY

Masahiro Nagasu

Person

Patents Grantslast 30 patents

Power converter and power converter of rolling stock

Drive device for railway vehicle

Drive circuit of semiconductor device

Drive circuit for power semiconductor switching device

Control apparatus of power conversion system

Circuit arrangement having a free-wheel diode

Hybrid cruising control system

Gate drive circuit with reduced switching loss and noise

Information transmission system and information transmission method

Gate driver circuit for switching device

Fault detection system

Fault detection system

Fault detection system

Railway vehicle operation-control system and a railway vehicle usin...

Flat semiconductor device and power converter employing the same

Semiconductor circuit preventing electromagnetic noise

Semiconductor power converting apparatus

Electric power converting system with integrator providing output i...

Gate drive circuit of voltage drive switching element

Semiconductor power converting apparatus

Semiconductor circuit and semiconductor device for use in equipment...

Inverter apparatus having improved switching element

Semiconductor device and inverter apparatus using the semiconductor...

Diode and power converting apparatus

Semiconductor thyristor switching device and power converter using...

Compound semiconductor device controlled by MIS gate, driving metho...

Patents Applicationslast 30 patents

DRIVE DEVICE FOR RAILWAY VEHICLE

POWER CONVERTER AND POWER CONVERTER OF ROLLING STOCK

DRIVE CIRCUIT OF SEMICONDUCTOR DEVICE

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

CONTROL APPARATUS OF POWER CONVERSION SYSTEM

CIRCUIT ARRANGEMENT HAVING A FREE-WHEEL DIODE

Hybrid Cruising Control System

Gate Drive Circuit

DRIVE CIRCUIT FOR POWER SEMICONDUCTOR SWITCHING DEVICE

GATE DRIVER CIRCUIT FOR SWITCHING DEVICE

Fault detection system

Information transmission system and information transmission method

Semiconductor circuit, method of driving the same and semiconductor...

Fault detection system

Fault detection system

Railway vehicle operation-control system and a railway vehicle usin...

Flat semiconductor device and power converter employing the same

Semiconductor circuit, method of driving the same and semiconductor...

Support system and method for recovering a train, and information t...

Semiconductor power converting apparatus