Sadatsugi Machida

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Hachioji, JP

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Patents Grantslast 30 patents

Information Patent Grant
Two-laser collimated beam optical head with monitor
- Patent number 5,016,234
- Issue date May 14, 1991
- Hitachi, Ltd.
- Shigeru Nakamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head and optical information processor using the same
- Patent number 4,873,678
- Issue date Oct 10, 1989
- Hitachi, Ltd.
- Shigeru Nakamura
- G11 - INFORMATION STORAGE