Richard Heilbrun (1874-1945) studied in Bonn and the University and the Technical University in Berlin, receiving his Ph.D. from the University of Heidelberg in 1895. In 1897-1899 he worked as an Assistant Professor at the Berlin Bergakademie, in 1902-1903 at the Department of Electronics at the German Technical University in Brno. He published multiple articles, as well as Elementare Vorlesungen über Telegraphie und Telephonie (Berlin: G. Siemens, 1902-1906). In 1909, he founded the Milliwatt Company in Berlin, manufacturing medical electronic instruments and electric blankets. When the factory was „Aryanized“ in 1936, R. Heilbrun escaped to England, where he died in August 1945. (Pavel Šišma, Učitelé na německé technice v Brně 1849-1945, Práce z dějin vědy a techniky 3  (Praha: Společnost pro dějiny vědy a techniky a Národní technické muzeum, 2004), 171.)