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Koyoshi Takei
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Tsurugashima, JP
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last 30 patents
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Patent Grant
Method of manufacturing non-regrowth distributed feedback ridge sem...
Patent number
6,291,256
Issue date
Sep 18, 2001
Pioneer Corporation
Nong Chen
H01 - BASIC ELECTRIC ELEMENTS
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Patent Grant
Non-regrowth distributed feedback ridge semiconductor laser and met...
Patent number
5,982,804
Issue date
Nov 9, 1999
Pioneer Electronic Corporation
Nong Chen
H01 - BASIC ELECTRIC ELEMENTS