Kiyoyuki Yokoyama

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Isehara, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical functional devices and integrated optical devices having a...
- Patent number 5,689,358
- Issue date Nov 18, 1997
- Nippon Telegraph & Telephone Corporation
- Masashi Nakao
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Method for producing various semiconductor optical devices of diffe...
- Patent number 5,585,957
- Issue date Dec 17, 1996
- Nippon Telegraph & Telephone Corporation
- Masashi Nakao
- B82 - NANO-TECHNOLOGY