Niilo and Valto Karhumäki also known as the Karhumäki brothers were Finnish aviation pioneers. The Karhumäki brothers were born in Multia but moved later to Keljo near Jyväskylä where they began building aircraft in late 1924. They constructed four aircraft in the 1920s: Karhu 1 Karhu 2 Karhu 3 and Tiira. Their interest in aviation was soon extended into the business world.
