Veljekset Karhumäki O/Y established 1924 to build light aircraft under licence, adding Viri (Finnish club of aero engineers design) 1935. In 1941 moved into new factory at Halli to build llmavoimat (air force) trainers. Postwar designed Karhu 48B high-wing 4-seater on wheels, skis or floats. A reproduction of the 1929 Tiira tandem parasol monoplane began flying in 2004.