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Toyokazu Iwakiri
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Tokyo, JP
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last 30 patents
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Patent Grant
Method for polishing optical fiber end surface
Patent number
5,743,787
Issue date
Apr 28, 1998
Seiko Instruments Inc.
Keiichi Ishiyama
B24 - GRINDING POLISHING
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Patent Grant
Optical attenuator
Patent number
4,893,889
Issue date
Jan 16, 1990
Seiko Instruments Inc.
Toyokazu Iwakiri
G02 - OPTICS