The earliest confirmed 3D film shown to an out-of-house audience was "The Power of Love", which premiered at the Ambassador Hotel Theater in Los Angeles on 27 September 1922. The camera rig was a product of the film's producer, Harry K. Fairall, and cinematographer Robert F. Elder. It was filmed dual-strip in black and white, and single strip color anaglyphic release prints were produced using a color film invented and patented by Harry K. Fairall. A single projector could be used to display the movie but anaglyph glasses were used for viewing. The camera system and special color release print film all received U.S Patent No. 1,784,515 on Dec 9, 1930. After a preview for exhibitors and press in New York City, the film dropped out of sight, apparently not booked by exhibitors, and is now considered lost.