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1974 Foundation of Dr. L. Hoffmann GdBR. Solutions and reagents for blood investigation in Laaber
1983 Dr. L. Hoffmann GdBR, solutions and reagents for blood investigation in Ihrlerstein.
1985 Foundation of Chemos GdBR, complete lab need in Regensburg
1996 Foundation of Chemos GmbH, complete lab need in Regenstauf
1997 Focus of Chemos GmbH in sourcing and sale of chemicals
2003 Globalization of suppliers and customers
2015 New owner and legal change from Chemos GmbH into Chemos GmbH&Co.KG