Hiromitsu Tomiyama

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Ibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Amine compound and electro-luminescence device comprising same
- Patent number 5,707,747
- Issue date Jan 13, 1998
- Hodogaya Chemical Co., Ltd.
- Hiromitsu Tomiyama
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Tetraaryl benzidines
- Patent number 5,639,914
- Issue date Jun 17, 1997
- Hodogaya Chemical Co., Ltd.
- Hiromitsu Tomiyama
- C07 - ORGANIC CHEMISTRY