Tomiya Sonoda

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Machida, JP

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Patents Grantslast 30 patents

Information Patent Grant
Liquid crystal display device and color filter for use with the liq...
- Patent number 5,190,794
- Issue date Mar 2, 1993
- Kabushiki Kaisha Toshiba
- Thunekazu Yoshino
- G02 - OPTICS
Information Patent Grant
Liquid crystal display device and color filter for use with the liq...
- Patent number 5,042,920
- Issue date Aug 27, 1991
- Kabushiki Kaisha Toshiba
- Thunekazu Yoshino
- G02 - OPTICS
Information Patent Grant
Information recording disk provided with distinguishing mark
- Patent number 4,814,928
- Issue date Mar 21, 1989
- Kabushiki Kaisha Toshiba
- Hisashi Ito
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular magnetic recording medium
- Patent number 4,762,742
- Issue date Aug 9, 1988
- Kabushiki Kaisha Toshiba
- Tomiya Sonoda
- G11 - INFORMATION STORAGE