Kazuya Ishida

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Numazu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Photoconductive composition containing trisazo and disazo compounds
- Patent number 5,370,954
- Issue date Dec 6, 1994
- Ricoh Company, Ltd.
- Katsuichi Ohta
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic copying apparatus having photoconductor with ma...
- Patent number 5,105,222
- Issue date Apr 14, 1992
- Ricoh Company, Ltd.
- Katsuichi Ohta
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY