 Lauste never successfully exploited his innovations, which came to an effective dead end.In 1914, Finnish inventor Eric Tigerstedt was granted German patent 309,536 for his sound-on-film work; that same year, he apparently demonstrated a film made with the process to an audience of scientists in Berlin.Hungarian engineer Denes Mihaly submitted his sound-on-film Projectofon concept to the Royal Hungarian Patent Court in 1918; the patent award was published four years later.