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Yasuji Hattori
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Yokohama, JP
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Patents Grants
last 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