(under subclass 12) Subject matter in which the desired time relationship between the operation of the picture recorder or reproducer and the sound reproducer is obtained by regulation of the speed of operation of the units independently of each other.
(1) Note. This subclass may include common or separate picture and sound carriers.
SEE OR SEARCH THIS CLASS, SUBCLASS:
15+, for motion picture apparatus where the sound controls the picture.
19+, for motion picture apparatus where the picture controls the sound.
180+, for camera and/or projection drive mechanism with speed regulation or selection.
