Takeshi Onaka

Person

Hitachi, JP

People

Patents Grantslast 30 patents

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
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
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
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

Patents Applicationslast 30 patents

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
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
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
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...

Takeshi Onaka

Person

Patents Grantslast 30 patents

Power supply with uninterruptible function

Power supply with uninterruptible function

DC power supply device

Synchronized rectifier voltage step down DC-DC converter and contro...

DC power supply device

Direct-current power-supply apparatus, control circuit thereof and...

Method of driving semiconductor switching device in non-saturated s...

Patents Applicationslast 30 patents

Power supply with uninterruptible function

DC power supply device

DC-DC converter and control circuit therefor

Power Supply With Uninterrupted Function

DC power supply device

Direct-current power-supply apparatus, control circuit thereof and...