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Hiroshi Rikukawa
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Tokyo, JP
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last 30 patents
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Patent Grant
Polarization plane switch and optical switching device using the same
Patent number
5,521,741
Issue date
May 28, 1996
FDK Corporation
Hiromitsu Umezawa
G02 - OPTICS
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last 30 patents
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Patent Application
Polarizer and optical device using it
Publication number
20040013343
Publication date
Jan 22, 2004
Masaharu Hoshikawa
G02 - OPTICS