Changsong Ma

Follow

Person

Guangzhou-Panyu, Guangdong, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Electronic ballast for lighting unit and lighting apparatus
- Patent number 8,917,030
- Issue date Dec 23, 2014
- Osram GmbH
- Hong Dai
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
ELECTRONIC BALLAST FOR LIGHTING UNIT AND LIGHTING APPARATUS
- Publication number 20130169185
- Publication date Jul 4, 2013
- OSRAM GMBH
- Hong Dai
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR