Kenta Watase

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical information recording medium
- Patent number 5,401,549
- Issue date Mar 28, 1995
- Ricoh Company, Ltd.
- Kenta Watase
- G11 - INFORMATION STORAGE
Information Patent Grant
Toner concentration control apparatus
- Patent number 4,389,972
- Issue date Jun 28, 1983
- Ricoh Company, Ltd.
- Koji Hirakura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Toner concentration control apparatus
- Patent number 4,369,733
- Issue date Jan 25, 1983
- Ricoh Company, Ltd.
- Koji Hirakura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Toner developing ability measuring system for electrostatography
- Patent number 4,266,141
- Issue date May 5, 1981
- Ricoh Company, Ltd.
- Koji Hirakura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY