Dongjian Song

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Zhuhai Guangdong, CN

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Patents Grantslast 30 patents

Information Patent Grant
Electric device
- Patent number 9,496,112
- Issue date Nov 15, 2016
- EPCOS AG
- Jifeng Qin
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Voltage dependent resistor with overheated protection structure
- Patent number 8,274,356
- Issue date Sep 25, 2012
- EPCOS (Zhuhai FTZ) Co., Ltd.
- Jifeng Qin
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Electric Device
- Publication number 20140292472
- Publication date Oct 2, 2014
- EPCOS AG
- Jifeng Qin
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Voltage Dependent Resistor with Overheated Protection Structure
- Publication number 20110057763
- Publication date Mar 10, 2011
- Jifeng Qin
- H01 - BASIC ELECTRIC ELEMENTS