Yifan Qian

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Organic electroluminescent device having partition wall and a manuf...
- Patent number 7,485,023
- Issue date Feb 3, 2009
- Toppan Printing Co., Ltd.
- Koji Takeshita
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Circuit board for organic electroluminescent panel, method of manuf...
- Patent number 6,339,288
- Issue date Jan 15, 2002
- Toppan Printing Co., Ltd.
- Yifan Qian
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Organic electroluminescent device and a manufacturing method of an...
- Publication number 20060220537
- Publication date Oct 5, 2006
- Koji Takeshita
- H01 - BASIC ELECTRIC ELEMENTS