the sum quickly became worthless due to the hyperinflation in Germany during 1921 to 1923. In 1922, Tigerstedt moved his laboratory to Finland and founded a new company called “Tigerstedts patenter”, which however also failed. Move to America In 1923, Tigerstedt moved to America where he founded his last company, the Tiger Manufacturing Co., to produce small radio receivers and cryptographic devices. The Mexican government purchased two of the cryptographic devices, and the radio receivers also sold relatively well. Tigerstedt had the opportunity to meet with the great American inventor Thomas Alva Edison, who wrote a letter of recommendation for Tigerstedt to the director of the Department of Commerce. Death When it finally seemed that Tigerstedt was on the verge of commercial success, he was involved in an ultimately fatal car accident on April 20, 1924, when another car unexpectedly turned in front of the car Tigerstedt was travelling in. There were persistent rumours that a competitor had arranged for the accident, but there was never any proof of this. Exactly one year later, on April 20, 1925, he succumbed to tuberculosis at the New York Fifth Avenue Hospital, possibly due to side effects from his injuries in the car accident. He wrote his last letter to his brother Göran, in which he described the state of his company, explained the structure of a new membrane that he was developing, and stated that he was about to undergo a kidney operation due to the spreading tuberculosis. Unfortunately, medical science was not advanced enough to be able to save his life. After his death, his brother travelled to America and brought his ashes home for burial in Helsinki. As with many inventors, Tigerstedt's inventions were never fully appreciated during his own lifetime. He is buried at the Hietaniemi Cemetery owned by the Lutheran Church of Finland. Inventions Tigerstedt experimented in many areas. He developed a new version of the shotgun that could be fired using the thumbs and that counted the number of shots fired. Unfortunately, he was perennially short of funds, and he did not have enough financial standing to file for a patent. Sound-on-film technology Tigerstedt's greatest interest was in the field of sound recording. He had developed a prototype for recording sound on a metal wire as early as 1912 and was convinced that he could find a way to record sound directly on motion picture film. He