(under subclass 1) Subject matter in which a particular special relationship exists between the picture and sound reproducer and a viewing screen.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11, for a system with a plurality of sound transducers located at predetermined positions with respect to the screen to allocate the sound to a particular portion of the reproduced motion picture.
SEE OR SEARCH CLASS
359, Optics: Systems (Including Communication) and Elements,
444, for projection screens with a sound producer and subclass 445 for acoustical screens.
