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Po Wah Chang
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Kowloon, HK
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Patents Grants
last 30 patents
Information
Patent Grant
Serial multi-battery charger with independent simultaneous charge a...
Patent number
9,385,542
Issue date
Jul 5, 2016
Hong Kong Applied Science & Technology Research Institute Company, Limited
Po Wah Chang
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
LED driver with small output ripple without requiring a high-voltag...
Patent number
9,306,461
Issue date
Apr 5, 2016
Hong Kong Applied Science & Technology Research Institute Company, Limited
Po Wah Chang
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Output current estimation for an isolated flyback converter with va...
Patent number
8,780,590
Issue date
Jul 15, 2014
Hong Kong Applied Science & Technology Research Institute Company, Ltd.
Wai Kit (Victor) So
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Patents Applications
last 30 patents
Information
Patent Application
LED Driver with Small Output Ripple Without Requiring a High-Voltag...
Publication number
20150381054
Publication date
Dec 31, 2015
Hong Kong Applied Science and Technology Research Institute Company Limited
Po Wah CHANG
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Serial Multi-Battery Charger with Independent Simultaneous Charge a...
Publication number
20150380959
Publication date
Dec 31, 2015
Hong Kong Applied Science and Technology Research Institute Company Limited
Po Wah CHANG
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Output Current Estimation for an Isolated Flyback Converter With Va...
Publication number
20130294118
Publication date
Nov 7, 2013
Hong Kong Applied Science and Technology Research Institute Company Limited
Wai Kit (Victor) SO
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
PROGRAMMABLE ELECTRO-MAGNETIC-INTERFERENCE (EMI) REDUCTION WITH ENH...
Publication number
20120126901
Publication date
May 24, 2012
Hong Kong Applied Science and Technology Research Institute Company Limited
Chi Tak (Gerry) LEUNG
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Application
Constant-Current Control Module using Inverter Filter Multiplier fo...
Publication number
20110216559
Publication date
Sep 8, 2011
Hong Kong Applied Science and Technology Research Institute Company Limited
Chik Wai (David) Ng
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER