Herlin Chang

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Sheng Keng Shiang, TW

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Patents Grantslast 30 patents

Information Patent Grant
Multiple power sources control system
- Patent number 6,768,225
- Issue date Jul 27, 2004
- DigiPower Manufacturing Inc.
- Herlin Chang
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Uninterruptible DC power system
- Patent number 6,735,096
- Issue date May 11, 2004
- DigiPower Manufacturing Inc.
- Herlin Chang
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Lighting equipment built-in on-line uninterruptible power system ca...
- Patent number 6,577,513
- Issue date Jun 10, 2003
- DigiPower Manufacturing Inc.
- Herlin Chang
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Network-based remotely-controlled power switch device
- Patent number 6,507,273
- Issue date Jan 14, 2003
- Digipower Manufacturing Inc.
- Herlin Chang
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Anion uninterruptible power supply (UPS)
- Publication number 20050052816
- Publication date Mar 10, 2005
- Herlin Chang
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Uninterruptible power supply circuit having hot swappable battery m...
- Publication number 20050052085
- Publication date Mar 10, 2005
- Herlin Chang
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Application
Uninterruptible DC power system
- Publication number 20030128562
- Publication date Jul 10, 2003
- Herlin Chang
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Application
Multiple power sources control system
- Publication number 20030042798
- Publication date Mar 6, 2003
- Digi Power Manufacturing Inc.
- Herlin Chang
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC