Tomoaki Yoshida

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Natori, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical line printhead and an LED chip used therefor
- Patent number 5,684,523
- Issue date Nov 4, 1997
- Ricoh Company, Ltd.
- Shunichi Satoh
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Semiconductor optical device having an optical confinement structure
- Patent number 5,307,200
- Issue date Apr 26, 1994
- Ricoh Company, Ltd.
- Tomoaki Yoshida
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Semiconductor light emitting array with particular surfaces
- Patent number 5,091,757
- Issue date Feb 25, 1992
- Ricoh Company, Ltd.
- Tomoaki Yoshida
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Surface emission type semiconductor light-emitting device
- Patent number 4,897,846
- Issue date Jan 30, 1990
- Inaba; Fumio
- Tomoaki Yoshida
- H01 - BASIC ELECTRIC ELEMENTS