Eric Ka Wai Cheng

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Hung Hom, HK

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Patents Grantslast 30 patents

Information Patent Grant
Method and system for automatically controlling power supply to a l...
- Patent number 7,781,987
- Issue date Aug 24, 2010
- The Hong Kong Polytechnic University
- Eric Ka Wai Cheng
- B60 - VEHICLES IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Energy-saving controller for three-phase induction motors
- Publication number 20100213886
- Publication date Aug 26, 2010
- The Hong Kong Polytechnic University
- Eric Ka Wai Cheng
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
HID ballast with integrated voltage multiplier and lamp temperature...
- Publication number 20090251076
- Publication date Oct 8, 2009
- The Hong Kong Polytechnic University
- Eric Ka Wai Cheng
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
METHOD AND SYSTEM FOR AUTOMATICALLY CONTROLLING POWER SUPPLY TO A L...
- Publication number 20090225559
- Publication date Sep 10, 2009
- The Hong Kong Polytechnic University
- Eric Ka Wai Cheng
- B60 - VEHICLES IN GENERAL
Information Patent Application
Square-wave modulated voltage dip restorer
- Publication number 20080315684
- Publication date Dec 25, 2008
- The Hong Kong Polytechnic University
- Eric Ka Wai Cheng
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...