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Hitachi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Switching power supply device and the semiconductor integrated circ...
Patent number
7,158,392
Issue date
Jan 2, 2007
Renesas Technology Corp.
Kyoichi Hosokawa
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Backup power supply
Patent number
7,157,810
Issue date
Jan 2, 2007
Hitachi, Ltd.
Akihiko Kanouda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Power supply with uninterruptible function
Patent number
7,053,502
Issue date
May 30, 2006
Hitachi, Ltd.
Nobuyuki Aihara
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Backup power supply
Patent number
6,977,448
Issue date
Dec 20, 2005
Hitachi, Ltd.
Akihiko Kanouda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Power supply with uninterruptible function
Patent number
6,795,322
Issue date
Sep 21, 2004
Hitachi, Ltd.
Nobuyuki Aihara
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
DC power supply device
Patent number
6,643,152
Issue date
Nov 4, 2003
Hitachi, Ltd.
Norikazu Tokunaga
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Synchronized rectifier voltage step down DC-DC converter and contro...
Patent number
6,603,671
Issue date
Aug 5, 2003
Hitachi, Ltd.
Norikazu Tokunaga
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Voltage regulator module for micro processor and CPO using a super...
Patent number
6,580,597
Issue date
Jun 17, 2003
Hitachi, Ltd.
Akihiko Kanouda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
DC-DC step-down converter with super capacitor
Patent number
6,567,261
Issue date
May 20, 2003
Hitachi, Ltd.
Akihiko Kanouda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
DC power supply device
Patent number
6,507,507
Issue date
Jan 14, 2003
Hitachi, Ltd.
Norikazu Tokunaga
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Direct-current power-supply apparatus, control circuit thereof and...
Patent number
6,496,395
Issue date
Dec 17, 2002
Hitachi Ltd.
Norikazu Tokunaga
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
DC-DC converter with switchable control mode
Patent number
6,489,756
Issue date
Dec 3, 2002
Hitachi, Ltd.
Akihiko Kanouda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Method of driving semiconductor switching device in non-saturated s...
Patent number
6,381,152
Issue date
Apr 30, 2002
Hitachi, Ltd.
Tadashi Takahashi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Power inverter device
Patent number
6,028,779
Issue date
Feb 22, 2000
Hitachi, Ltd.
Kiyoshi Sakamoto
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Power supply system for supplying electric power to a load through...
Patent number
5,768,117
Issue date
Jun 16, 1998
Hitachi, Ltd.
Tadashi Takahashi
G05 - CONTROLLING REGULATING
Information
Patent Grant
Parallelized power supply system providing uninterrupted operation
Patent number
5,638,264
Issue date
Jun 10, 1997
Hitachi, Ltd.
Katsunori Hayashi
G05 - CONTROLLING REGULATING
Information
Patent Grant
Multi-output DC-DC convertor
Patent number
5,559,682
Issue date
Sep 24, 1996
Hitachi, Ltd.
Akihiko Kanouda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Flat transformer and power supply unit having flat transformer
Patent number
5,502,430
Issue date
Mar 26, 1996
Hitachi, Ltd.
Tadashi Takahashi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Semiconductor integrated circuit unit
Patent number
5,412,558
Issue date
May 2, 1995
Hitachi, Ltd.
Naoki Sakurai
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Information processing apparatus including a control circuit for co...
Patent number
5,384,516
Issue date
Jan 24, 1995
Hitachi, Ltd.
Kenji Kawabata
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Power source for supplying DC voltage by converting AC voltage from...
Patent number
5,345,374
Issue date
Sep 6, 1994
Hitachi, Ltd.
Masayoshi Sato
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Power supply control system
Patent number
5,297,015
Issue date
Mar 22, 1994
Hitachi, Ltd.
Hideki Miyazaki
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Inverter circuit
Patent number
5,280,228
Issue date
Jan 18, 1994
Hitachi, Ltd.
Akihiko Kanouda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Parallel circuit module including a diode and an IGBT
Patent number
5,274,541
Issue date
Dec 28, 1993
Hitachi, Ltd.
Shin Kimura
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Semiconductor integrated circuit unit
Patent number
5,253,156
Issue date
Oct 12, 1993
Hitachi, Ltd.
Naoki Sakurai
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Inverter
Patent number
5,216,587
Issue date
Jun 1, 1993
Hitachi, Ltd.
Hideki Miyazaki
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Driving circuit for a switching element including an improved power...
Patent number
5,216,349
Issue date
Jun 1, 1993
Hitachi, Ltd.
Akihoko Kanouda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
DC-DC converter and a computer using the converter
Patent number
5,088,017
Issue date
Feb 11, 1992
Hitachi, Ltd.
Takao Yaginuma
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Level shift circuit for controlling a driving circuit
Patent number
5,057,721
Issue date
Oct 15, 1991
Hitachi, Ltd.
Hideki Miyazaki
G05 - CONTROLLING REGULATING
Information
Patent Grant
Solid state current sensing circuit and protection circuit
Patent number
5,008,586
Issue date
Apr 16, 1991
Hitachi, Ltd.
Hideki Miyazaki
H03 - BASIC ELECTRONIC CIRCUITRY
Patents Applications
last 30 patents
Information
Patent Application
REACTOR AND POWER CONVERTER USING THE SAME
Publication number
20120229118
Publication date
Sep 13, 2012
Hitachi, Ltd
Naoyuki KURITA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Power supply with uninterruptible function
Publication number
20050078494
Publication date
Apr 14, 2005
NOBUYUKI AIHARA
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Application
Backup power supply
Publication number
20040145926
Publication date
Jul 29, 2004
Akihiko Kanouda
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Application
Switching power supply device and the semiconductor integrated circ...
Publication number
20040136209
Publication date
Jul 15, 2004
RENESAS TECHNOLOGY CORP.
Kyoichi Hosokawa
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
DC-DC converter and a method of controlling thereof
Publication number
20030197494
Publication date
Oct 23, 2003
Hitachi, Ltd.
Akihiko Kanouda
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
Backup power supply
Publication number
20030184937
Publication date
Oct 2, 2003
Hitachi, Ltd.
Akihiko Kanouda
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Application
DC power supply device
Publication number
20030107906
Publication date
Jun 12, 2003
Hitachi, Ltd
Norikazu Tokunaga
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
VOLTAGE REGULATOR MODULE FOR MICRO PROCESSOR AND CPO USING A SUPER...
Publication number
20030042878
Publication date
Mar 6, 2003
Akihiko Kanouda
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
DC-DC STEP-DOWN CONVERTER WITH AN ELECTRIC DOUBLE-LAYER CAPACITOR
Publication number
20030039092
Publication date
Feb 27, 2003
Hitachi, Ltd
Akihiko Kanouda
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
DC-DC converter and a method of controlling thereof
Publication number
20020185994
Publication date
Dec 12, 2002
Hitachi, Ltd.
Akihiko Kanouda
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
Backup power supply
Publication number
20020186576
Publication date
Dec 12, 2002
Akihiko Kanouda
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Application
DC-DC converter and control circuit therefor
Publication number
20020136030
Publication date
Sep 26, 2002
Hitachi, Ltd.
Norikazu Tokunaga
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
DC-DC converter
Publication number
20020080631
Publication date
Jun 27, 2002
Akihiko Kanouda
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
Power Supply With Uninterrupted Function
Publication number
20020071292
Publication date
Jun 13, 2002
NOBUYUKI AIHARA
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Application
DC power supply device
Publication number
20020067630
Publication date
Jun 6, 2002
Hitachi, Ltd.
Norikazu Tokunaga
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
Direct-current power-supply apparatus, control circuit thereof and...
Publication number
20010026462
Publication date
Oct 4, 2001
Norikazu Tokunaga
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...