"Heraeus is a German technology group with a focus on precious and special metals, medical technology, quartz glass, sensors and specialty light sources. Founded in Hanau ...
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in 1851, the company is one of the largest family-owned companies in Germany in terms of revenue. Heraeus employs approximately 14,900 people in 40 countries worldwide and generated a total revenue of 22.4 billion euro in 2019. " - (en.wikipedia.org 11.08.2021)