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Keizaburo Ogawa
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Kawagoe, JP
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last 30 patents
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Patent Grant
Sustained release pharmaceutical tablet of theophylline and product...
Patent number
4,692,337
Issue date
Sep 8, 1987
Nikken Chemicals Co., Ltd.
Tadashi Ukigaya
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Patent Grant
Theophylline sustained release granule
Patent number
4,261,970
Issue date
Apr 14, 1981
Nikken Chemicals Co., Ltd.
Keizaburo Ogawa
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE