Takashi Toyonaka

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Hachiouji, JP

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Patents Grantslast 30 patents

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Semiconductor laser devices
- Patent number 5,844,931
- Issue date Dec 1, 1998
- Hitachi, Ltd.
- Misuzu Sagawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical isolator, optical circuit, and rare-earth-doped fiber optic...
- Patent number 5,283,846
- Issue date Feb 1, 1994
- Hitachi, Ltd.
- Takashi Toyonaka
- G02 - OPTICS