Tetsuhiro Umezaki

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Koshigaya, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electrophotographic photoreceptor having an azo compound
- Patent number 4,931,349
- Issue date Jun 5, 1990
- Dainichiseika Color & Chemicals Mfg. Co.
- Masaru Hasegawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoreceptor comprising azo compound and coupler
- Patent number 4,912,001
- Issue date Mar 27, 1990
- Dainichi Seika Color & Chemicals Mfg. Co., Ltd.
- Hisao Kouno
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY