original Patent - Joh. Rud. Geigy & Co. , Basel , Schweiz | 1899 | Darstellung von reinem Indigo | Farbe | A. von Baeyer

Published by Patentinhaber: Joh. Rud. Geigy & Co. , Basel , SchweizPatent: Verfahren zur Darstellung von reinem IndigoPatentiert am: 18.07.1899P-517
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