Zenjiro Okuno

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Tokyo, JP

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Patents Grantslast 30 patents

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Electrophotographic photosensitive material with electron donors an...
- Patent number 4,264,695
- Issue date Apr 28, 1981
- Ricoh Co., Ltd.
- Akio Kozima
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Toner composition for multiple copy electrostatic photography
- Patent number 4,242,434
- Issue date Dec 30, 1980
- Ricoh Company, Ltd.
- Koji Hirakura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY