Biography: Friedrich August Haselwander (1859-1932) studied mathematics, physics, chemistry, botany, mineralogy, economics and electronics at the Technical University of Karlsruhe, the Universities of Strasbourg and Munich. In self-study he additionally acquired knowledge in the engineering sciences. In 1886, in Offenburg, where he was born, he constructed a DC dynamo machine from which he developed the three-phase generator, a world first. In 1891 he founded the Badische Elektrizitätswerke in Lahr, where he worked until their liquidation in 1893. In cooperation with Adolf Kolbe, he applied for his patents at home and abroad and knew how to draw financial benefit from them. After disputes over the copyright of his three-phase generator patent, Haselwander increasingly devoted himself to the development of motors. In 1897 he applied for a patent for the first compressorless crude oil engine. After working as a partner and technical director of the patent exploitation syndicate Haselwander, Wenk-Wolff and Genossen in Mannheim, as co-founder and partner of Maschinenfabrik Haselwander, among others.