Hajime Yokoi

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Cyclic tertiary amine compound and organic electroluminescent devic...
- Patent number 6,936,189
- Issue date Aug 30, 2005
- Chisso Corporation
- Wang Guofang
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Cyclic tertiary amine compound and organic electroluminescent devic...
- Patent number 6,761,981
- Issue date Jul 13, 2004
- Chisso Corporation
- Wang Guofang
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Cyclic tertiary amine compound and organic electroluminescent devic...
- Publication number 20040170866
- Publication date Sep 2, 2004
- Wang Guofang
- C07 - ORGANIC CHEMISTRY
Information Patent Application
Cyclic tertiary amine compound and organic electroluminescent devic...
- Publication number 20020058155
- Publication date May 16, 2002
- Wang Guofang
- C07 - ORGANIC CHEMISTRY