Kiyoto Nagasawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Conversion using a variable reference based on image density
- Patent number 5,027,117
- Issue date Jun 25, 1991
- Ricoh Company, Ltd.
- Yoshiki Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image forming apparatus and method of controlling output of semicon...
- Patent number 4,967,284
- Issue date Oct 30, 1990
- Ricoh Company, Ltd.
- Yoshiki Yoshida
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image reproducing apparatus
- Patent number 4,951,160
- Issue date Aug 21, 1990
- Ricoh Company, Ltd.
- Yasumori Nagahara
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus having laser light source
- Patent number 4,905,022
- Issue date Feb 27, 1990
- Ricoh Company, Ltd.
- Kiyoto Nagasawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Semiconductor laser control apparatus
- Patent number 4,899,344
- Issue date Feb 6, 1990
- Ricoh Co., Ltd.
- Isamu Shibata
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Exposure value control system for copying machines
- Patent number 4,443,097
- Issue date Apr 17, 1984
- Ricoh Company, Ltd.
- Kiyoto Nagasawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Lamp power regulator
- Patent number 4,360,783
- Issue date Nov 23, 1982
- Ricoh Company, Ltd.
- Kiyoto Nagasawa
- G05 - CONTROLLING REGULATING