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Tokyo-To, JP
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last 30 patents
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Patent Grant
Lens array sheet, surface light source, and transmission type displ...
Patent number
5,841,572
Issue date
Nov 24, 1998
Dai Nippon Printing Co., Ltd.
Rika Ando
G02 - OPTICS
Information
Patent Grant
Lens array sheet surface light source, and transmission type displa...
Patent number
5,808,784
Issue date
Sep 15, 1998
Dai Nippon Printing Co., Ltd.
Rika Ando
G02 - OPTICS