Today in 1906, John Balance is granted US patent No. 823,022 for improvements in a combined phonograph and stereopticon, synchronizing sound with pictures:
This invention relates to combined phonographs and picture-exhibitors; and one of the principal objects of the same is to provide a transparent recording-tape for the phonograph and to utilize said tape as the film for the picture attachment in order that a series of pictures may be exhibited simultaneously with a musical production.