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Yukihiro Toyota
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Shinjuku-Ku, JP
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Patents Grants
last 30 patents
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Patent Grant
Reflective cholesteric filter
Patent number
6,906,764
Issue date
Jun 14, 2005
Dai Nippon Printing Co., Ltd.
Keiji Kashima
G02 - OPTICS
Patents Applications
last 30 patents
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Patent Application
Reflective cholesteric filter
Publication number
20030038918
Publication date
Feb 27, 2003
DAI NIPPON PRINTING CO., LTD.
Keiji Kashima
G02 - OPTICS
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Patent Application
Polarized light extraction optical element
Publication number
20020113923
Publication date
Aug 22, 2002
Keiji Kashima
G02 - OPTICS