Haruo Hasegawa

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Patents Grantslast 30 patents

Information Patent Grant
Electrophotographic light-sensitive member with thin overlayer
- Patent number 4,469,771
- Issue date Sep 4, 1984
- Ricoh Co., Ltd.
- Haruo Hasegawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photosensitive material for use in electrophotography with a radiat...
- Patent number 4,296,190
- Issue date Oct 20, 1981
- Ricoh Co., Ltd.
- Haruo Hasegawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic light-sensitive member
- Patent number 4,225,648
- Issue date Sep 30, 1980
- Ricoh Company, Ltd.
- Haruo Hasegawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY