RCA

CALCULATORS OF THE SLIDE RULE TYPE, PHOTOGRAPHIC LENS, AND ARTICLES COMPOSED WHOLLY OR IN PART OF NATURAL AND/OR SYNTHETIC RUBBER SOLD AS PARTS FOR AND AS REPLACEMENT PARTS OF SOUND MOTION PICTURE RECORDING AND REPRODUCING EQUIPMENT NAMELY, CAPS FOR PROTECTING PHOTOGRAPHIC LENS, BUMPERS, COUPLINGS, ENDLESS BELTS, AND FEET FOR PROJECTORS AND RECORDERS