Toyoji Ishikawa

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Kawasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Image developing device
- Patent number 4,873,940
- Issue date Oct 17, 1989
- Ricoh Company, Ltd.
- Toyoji Ishikawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Dual-color copier
- Patent number 4,615,607
- Issue date Oct 7, 1986
- Ricoh Company, Ltd.
- Nobuyuki Yanagawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY