11. Bell pondered the photophone 's possible scientific use in the fiber-optic telecommunications: 12. The Photophone 's first practical use came in military communication systems many decades later. 13. Western Electric later acquired the Photophone trademark. 14. The military interest on photophone however continued. 15. Bell transferred the Photophone 's rights to the National Bell Telephone Company in May 1880. 16. In 1929, RKO Radio Pictures became the first motion picture studio to use Photophone exclusively. 17. Bell transferred the photophone 's intellectual property rights to the American Bell Telephone Company in May 1880. 18. The production company had contracted with RCA Photophone and Britain then had the nearest facility with the system. 19. On 25 May 1932, the " Los Angeles " participated in a demonstration of photophone technology. 20. In May 1929, RKO released " Syncopation ", the first film made in RCA Photophone .
