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Patents Grantslast 30 patents

Information Patent Grant
Current sensing inductor and a circuit thereof
- Patent number 8,242,771
- Issue date Aug 14, 2012
- Pi International Ltd.
- Chi Hung Cheung
- G01 - MEASURING TESTING
Information Patent Grant
Electric power conversion circuit having transfer gain variable by...
- Patent number 7,944,713
- Issue date May 17, 2011
- Pi International Ltd.
- Chi Hung Cheung
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Inverter device utilizing three switches controlled in a concurrent...
- Patent number 7,423,891
- Issue date Sep 9, 2008
- Pi International Ltd.
- Kwok-Pun Ho
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Fine-tuning circuit for the winding voltage of a transformer
- Patent number 7,227,762
- Issue date Jun 5, 2007
- Pi International Ltd.
- Chi Hung Cheung
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Zero voltage switching power conversion circuit
- Patent number 7,133,299
- Issue date Nov 7, 2006
- Pi International Ltd.
- Matthew Cheung
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

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