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Masahiro Hamaogi
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Odawara, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Power storage system and power source system
Patent number
9,680,303
Issue date
Jun 13, 2017
Hitachi Information & Telecommunication Engineering, Ltd.
Fumikazu Takahashi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Power factor correction device and method with off time prediction...
Patent number
8,564,992
Issue date
Oct 22, 2013
Hitachi Information & Telecommunication Engineering, Ltd.
Fumikazu Takahashi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Digital controlled power supply
Patent number
7,923,980
Issue date
Apr 12, 2011
Hitachi Computer Peripherals Co., Ltd.
Fumikazu Takahashi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Switching power supply
Patent number
7,880,440
Issue date
Feb 1, 2011
Hitachi Computer Peripherals Co., Ltd.
Fumikazu Takahashi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
DC backup power supply system, a disk array and a DC backup power s...
Patent number
7,840,840
Issue date
Nov 23, 2010
Hitachi Computer Peripherals Co., Ltd.
Fumikazu Takahashi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Bidirectional DC-DC converter and power supply apparatus with the same
Patent number
7,812,575
Issue date
Oct 12, 2010
Hitachi Computer Peripherals Co., Ltd.
Takae Shimada
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Switching power supply unit and disk array system
Patent number
7,705,562
Issue date
Apr 27, 2010
Hitachi Computer Peripherals Co., Ltd.
Fumikazu Takahashi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Data processing unit and DC backup power supply
Patent number
7,589,436
Issue date
Sep 15, 2009
Hitachi Computer Peripherals Co., Ltd.
Fumikazu Takahashi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
DC backup power supply system
Patent number
7,495,415
Issue date
Feb 24, 2009
Hitachi, Ltd.
Akihiko Kanouda
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Uninterruptible power system
Patent number
7,432,617
Issue date
Oct 7, 2008
Hitachi, Ltd.
Akihiko Kanouda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
DC backup power supply system and disk array using same
Patent number
7,406,623
Issue date
Jul 29, 2008
Hitachi Computer Peripherals Co., Ltd.
Fumikazu Takahashi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
DC backup power supply device and method for diagnosing the same
Patent number
7,245,469
Issue date
Jul 17, 2007
Hitachi, Ltd.
Minehiro Nemoto
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Uninterruptible power system
Patent number
7,049,711
Issue date
May 23, 2006
Hitachi, Ltd.
Akihiko Kanouda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Parallel power source system
Patent number
6,738,270
Issue date
May 18, 2004
Renesas Technology Corporation
Ryohei Saga
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Patents Applications
last 30 patents
Information
Patent Application
POWER STORAGE SYSTEM AND POWER SOURCE SYSTEM
Publication number
20140117756
Publication date
May 1, 2014
Hitachi Information & Telecommunication Engineering, Ltd.
Fumikazu TAKAHASHI
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
POWER FACTOR CORRECTION DEVICE AND CONTROL METHOD THEREOF
Publication number
20110096576
Publication date
Apr 28, 2011
Hitachi Computer Peripherals Co., Ltd.
Fumikazu TAKAHASHI
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
Digital Controlled Power Supply
Publication number
20090102446
Publication date
Apr 23, 2009
Hitachi Computer Peripherals, Co., Ltd.
Fumikazu Takahashi
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
Didirectional DC-DC converter and power supply apparatus with the same
Publication number
20080309301
Publication date
Dec 18, 2008
Takae Shimada
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
DC BACKUP POWER SUPPLY SYSTEM AND DISK ARRAY USING SAME
Publication number
20080290733
Publication date
Nov 27, 2008
Fumikazu Takahashi
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Application
SWITCHING POWER SUPPLY
Publication number
20080174276
Publication date
Jul 24, 2008
Fumikazu TAKAHASHI
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Application
Switching power supply unit and disk array system
Publication number
20070047100
Publication date
Mar 1, 2007
Fumikazu Takahashi
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Application
Uninterruptible power system
Publication number
20060267410
Publication date
Nov 30, 2006
Akihiko Kanouda
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
Data processing unit and DC backup power supply
Publication number
20060056142
Publication date
Mar 16, 2006
Fumikazu Takahashi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
DC backup power supply system
Publication number
20050206242
Publication date
Sep 22, 2005
Akihiko Kanouda
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
DC backup power supply system
Publication number
20050146223
Publication date
Jul 7, 2005
Akihiko Kanouda
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
DC backup power supply system and disk array using same
Publication number
20050099750
Publication date
May 12, 2005
Fumikazu Takahashi
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Application
Uninterruptible power system
Publication number
20040125626
Publication date
Jul 1, 2004
Akihiko Kanouda
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
DC backup power supply device and method for diagnosing the same
Publication number
20030231009
Publication date
Dec 18, 2003
Minehiro Nemoto
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Application
DC backup power supply system
Publication number
20030222618
Publication date
Dec 4, 2003
Akihiko Kanouda
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Parallel power source system
Publication number
20020074862
Publication date
Jun 20, 2002
Ryohei Saga
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC