Adolf Froelich was born in Łaziska, Opole Lubelskie County, Poland, to parents Reinhold Froelich and Antonina Wilhelmina Józefina Froelich (née Majewska). He studied brewing technology at the scientific department Weihenstephan of the University of Technology Munich in Freising. Furthermore he studied dentistry. He got his dentist approbation in 1918. As a dentist he worked inter alia in Jędrzejów. In 1932 he invented the double propeller. He was officer (rank: lieutenant) of the Polish Armed Forces. As a dentist he took part in the Polish-Soviet War being a member of the 9th Infantry Division. He died in Warsaw.
- Urząd Patentowy Rzeczpospolitej Polskiej Opis Patentowy Nr 18229, Warszawa 21 sierpnia 1933, Adolf Froelich, Podwójne śmigło.
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