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Hiroyuki Kunugiyama
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Hitachi, JP
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last 30 patents
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Patent Grant
Optical star coupler and method for manufacturing the same
Patent number
5,190,364
Issue date
Mar 2, 1993
Hitachi Cable Ltd.
Katsuyuki Imoto
G02 - OPTICS
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Patent Grant
Fiber optic distributed temperature sensor system
Patent number
5,113,277
Issue date
May 12, 1992
Hitachi Cable Limited
Yasuo Ozawa
G02 - OPTICS