(under the class definition) Subject matter wherein the projector is particularly designed so that the pictures to be projected may be directly inspected for faults or arranged in a particular position or sequence; or where the projector has auxiliary means so that the pictures may be previewed before projection or may be viewed on an auxiliary screen during projection on the main screen.
SEE OR SEARCH CLASS
352, Optics: Motion Pictures, appropriate subclasses for similar structure employed to edit or preview motion-picture film.
356, Optics: Measuring and Testing, for testing film for flaws.
