Peter Bang (1900–1957), son of Camillo Bang, a successful Danish businessman, showed great interest in radio technology from an early age. After graduating as an engineer in 1924, he spent six months working in a U.S. radio factory. Upon his return to Denmark, he teamed up with his friend Svend Olufsen (1897–1949), whose parents made the attic of their manor house in Struer in Jutland available for experiments. When they officially opened their business in 1925, Bang concentrated on the technology while Olufsen dealt with business. There were a number of successful developments in the 1930s and 1940s, including a sound recording system for the film industry, roof-mounted loudspeakers for circuses and army vehicles, and the iconic Beolit 39 radio with a Bakelite cabinet.