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Naoki Machida
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Higashimurayama, JP
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last 30 patents
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Patent Grant
Tetrahydroxanthone derivatives
Patent number
4,290,954
Issue date
Sep 22, 1981
Kowa Company Limited
Kazuhiro Onogi
C07 - ORGANIC CHEMISTRY
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Patent Grant
Methylmethioninesulfonium compounds, process for their preparation,...
Patent number
4,216,225
Issue date
Aug 5, 1980
Kowa Company, Ltd.
Masami Shiratsuchi
C07 - ORGANIC CHEMISTRY