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Hidenori Sai
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Tokyo, JP
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last 30 patents
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Patent Grant
Optical pick-up device having a plurality of light sources with dif...
Patent number
6,522,619
Issue date
Feb 18, 2003
Kabushiki Kaisha Sankyo Seiki Seisakusho
Katsushige Yanagisawa
G11 - INFORMATION STORAGE
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last 30 patents
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Patent Application
Optical pick-up device and method of manufacturing the same
Publication number
20010043520
Publication date
Nov 22, 2001
Katsushige Yanagisawa
G11 - INFORMATION STORAGE