Yasuji Hattori

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical waveguide having diffraction grating area and method of fab...
- Patent number 5,671,308
- Issue date Sep 23, 1997
- Sumitomo Electric Industries, Ltd.
- Akira Inoue
- G02 - OPTICS
Information Patent Grant
Method for identifying an optical fiber using a pattern of reflecte...
- Patent number 5,506,674
- Issue date Apr 9, 1996
- Sumitomo Electric Industries, Ltd.
- Akira Inoue
- G02 - OPTICS
Information Patent Grant
Optical isolator
- Patent number 5,381,261
- Issue date Jan 10, 1995
- Sumitomo Electric Industries, Ltd.
- Shigeru Hirai
- G02 - OPTICS
Information Patent Grant
Method of manufacturing fiber-optic collimators
- Patent number 5,265,179
- Issue date Nov 23, 1993
- Sumitomo Electric Industries, Ltd.
- Yoichi Ishiguro
- G02 - OPTICS
Information Patent Grant
Method and apparatus of measuring outer diameter and structure of o...
- Patent number 4,882,497
- Issue date Nov 21, 1989
- Sumitomo Electric Industries, Ltd.
- Akira Inoue
- G01 - MEASURING TESTING