73035298
Oct 23, 1974
Mar 16, 1976
OPHTHALMIC LENSES AND FRAMES, PROTECTIVE GLASSES AND LENSES THEREFOR; MATERIALS AND DEVICES USED BY OPTOMETRISTS AND OPHTHALMOLOGISTS FOR THE EXAMINATION AND CORRECTION OF VISION-NAMELY, FOCOMETERS, PUPILMETERS, KERATOMETERS, SKIASCOPES, READING SCALES, REFRACTING CHART PROJECTORS AND REFRACTOR COLUMNS
Electrical and Scientific Apparatus