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Seiichi Yoshikawa
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Koga, JP
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last 30 patents
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Patent Grant
Tobacco filter and fibrous ion exchange resin
Patent number
4,700,723
Issue date
Oct 20, 1987
Toray Industries, Inc.
Seiichi Yoshikawa
A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
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Patent Grant
Method of ion-exchanging and/or adsorption
Patent number
4,693,828
Issue date
Sep 15, 1987
Toray Industries, Inc.
Toshio Yoshioka
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE