Austrian Josef Sablatnig was pilot and experimenter 1911-13, then moving to Germany and becoming director of Union Flugzeugwerke. When this failed Dr Sablatnig formed Sablatnig Flugzeugbau GmbH, Berlin, in October 1915. First product was naval seaplane, SF 1 2-seat biplane. SF 2-SF 8 followed, LVG making 10 of 36 SF 2 and Sablatnig making 101 SF 5. Only small numbers were made of various landplanes, including C.I and II armed 2-seaters, N.1 night bomber and a 240-hp 2-seat night-fighter monoplane. Strenuous post-war efforts centred around a 4-passenger cabin aircraft with foldable parasol wings. Wound up 1921.