B & L
SPECTACLE FRAMES AND MOUNTINGS, SPECTACLE LENSES, OBJECTIVE LENSES FOR PROJECTORS, BINOCULARS AND FIELD GLASSES, MAGNIFYING LENSES AND READING GLASSES, APPARATUS FOR PROJECTING IMAGES OF CONTOURS OF OBJECTS FOR CHECKING, INSPECTION, OR MEASUREMENT, COMBINED RULER AND MAGNIFYING GLASS, SUN GLASSES, MICROSCOPES AND PARTS THEREOF, PHOTOMICROGRAPHIC APPARATUS, SPECTROPHOTOMETERS, SPECTROMETERS, SPECTROGRAPHS, DENSITOMETERS, SACCHARIMETERS, POLARISCOPES, MONOCHROMATORS, PHOTOMETERS, COLORIMETERS, ...
Expired · September 21, 1949 · 71585099 ·