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Katsusuke Tajima
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Tsukuba-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Hole-assisted single mode optical fiber
Patent number
7,228,040
Issue date
Jun 5, 2007
Nippon Telegraph and Telephone Corporation
Kazuhide Nakajima
G02 - OPTICS
Information
Patent Grant
High power acceptable optical fiber and fabrication method thereof
Patent number
5,303,318
Issue date
Apr 12, 1994
Nippon Telegraph & Telephone Corporation
Mitsuhiro Tateda
G02 - OPTICS
Information
Patent Grant
Single-polarization optical fiber
Patent number
4,913,521
Issue date
Apr 3, 1990
Nippon Telegraph & Telephone Corporation
Katsusuke Tajima
G02 - OPTICS
Patents Applications
last 30 patents
Information
Patent Application
Single mode optical fiber with electron vacancies
Publication number
20060045448
Publication date
Mar 2, 2006
Kazuhide Nakajima
G02 - OPTICS
Information
Patent Application
Method for manufacturing optical fiber using ultrasonic drill
Publication number
20030136154
Publication date
Jul 24, 2003
Katsusuke Tajima
G02 - OPTICS