Ma Hong Zhen

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Gougguan, CN

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Patents Grantslast 30 patents

Information Patent Grant
Telephone accessory device and system for hands free operation
- Patent number 8,130,943
- Issue date Mar 6, 2012
- VTech Telecommunications Limited
- Zheng Yong Jian
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Telephone Accessory Device And System For Hands Free Operation
- Publication number 20090175439
- Publication date Jul 9, 2009
- VTech Telecommunications Limited
- Zheng Yong Jian
- H04 - ELECTRIC COMMUNICATION TECHNIQUE