Hideaki Nakatsuka

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Patents Grantslast 30 patents

Information Patent Grant
Twisted nematic type liquid crystal display device having a color p...
- Patent number 4,759,612
- Issue date Jul 26, 1988
- Hitachi, Ltd.
- Hideaki Nakatsuka
- G02 - OPTICS
Information Patent Grant
Liquid crystal device using a Fresnel collimating lens for improvin...
- Patent number 4,756,604
- Issue date Jul 12, 1988
- Hitachi, Ltd.
- Hideaki Nakatsuka
- G02 - OPTICS