Hirohisa Otsuka

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Kawaguchi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Image formation apparatus
- Patent number 5,638,158
- Issue date Jun 10, 1997
- Ricoh Company, Ltd.
- Atsushi Sanpe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus with a contact member contacting an image c...
- Patent number 5,585,896
- Issue date Dec 17, 1996
- Ricoh Company, Ltd.
- Kouichi Yamazaki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Wire cleaning device for a corona discharge type charger
- Patent number 4,956,671
- Issue date Sep 11, 1990
- Ricoh Company, Ltd.
- Hirohisa Otsuka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Recycling automatic document feeder
- Patent number 4,921,236
- Issue date May 1, 1990
- Ricoh Company, Ltd.
- Sirou Saeki
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL