[ CAMERAS AND PARTS THEREOF; AEROCAMERAS; ] MOTION-PICTURE CAMERAS AND PROJECTORS; [ LANTERN ] FILM SLIDE AND STREOSCOPIC PROJECTORS; [ PHOTOGRAPHIC DEVELOPING, PRINTING, AND RETOUCHING, AND ] ENLARGING APPARATUS, AND PARTS THEREOF; [ PHOTOGRAPHIC EXPOSURE MEASURING INSTRUMENTS; OPTICAL VIEW FINDERS, SHUTTERS; PHOTOGRAMMETRIC INSTRUMENTS AND PARTS THEREOF; ELECTRICALLY CONTROLLED, WEIGHTING AND ASSORTING APPARATUS; MECHANICAL DRAWING INSTRUMENTS AND APPARATUS; SLIDE RULES; TALKING PICTURE MACHINES; PHONOMETERS; PHONOPHONES; PHONOSCOPES; PHONOPHOTOSCOPES; PHONOTELEMETERS; TONOMETERS; TONOGRAPHS; TONOSCOPES; STROBOSCOPES; PHOTOGRAMMETERS; GRAPHOMETERS; HELIPGRAPHS; HELIOMETERS; PHOTOMETERS; PHOTOPITOMETERS; PHOTOPTOMETERS; PHOTOSCOPES; PHOTOSYNTHOMETERS; PHOTOTELEGRAPHS; ] MICROSCOPES; [ MICROTOMES; TELESCOPES; PERISCOPES; COLLIMATORES; TELESCOPIC SIGHTS; OPTICAL SIGHTS FOR GUNS AND FIREARMS; TELESCOPIC BOMB SIGHTS; BALLISTIC INSTRUMENTS; SPEEDOMETERS; SPEED RECORDERS; TACHOMETERS; ANEMOMETERS; TELEMETERS; LABORATORY CHRONOGRAPHS USED TO GRAPHICALLY INDECATE DATA; ALTIMETERS; RANGE FINDERS; AEROTACHOMETERS; AEROCARTOGRAPHERS; CHROMOSCOPES; COLORIMETERS; POLARIMETERS; POLARISCOPES; SPECTROMETERS; SPECTROSCOPES; SPECTROGRAPHS; REFRACTOMETERS; INTERFEROMETERS; SPHEROMETERS; COMPASSES; STEREOSCOPES; STEREOSCOPIC COMPARATORS; STEROTACHOGRAPHS; STEREOPLANIGRAPHS; TRIANGULATORS; THEODOLITES; SEXTANTS; OCTANTS; GONIOMETERS; WEATHER INDICATROS; BAROMETERS; SEISMOGRAPHS; HEIGHT MEASURING INSTRUMENTS; WIND DIRECTION INDICATORS; WIND VELOCITY MEASURING APPARATURS; X-RAY MACHINES FOR MEASURING AND SCIENTIFIC PURPOSES; ALCHOLOMETERS; TITRATION APPARATUS; ANALYTICAL WEIGHTING AND MEASURING INTRUMENTS; BALACES; SCALES; DIMENSIONAL GAUGES, WATER GAUGES, PRESSURE GAUGES AND ARTS THEREOF; CALIPERS; CALIPERING INSTRUMENTS AND PARTS THEREOF; THERMOMETERS; THERMOSTATS; THERMOSTATIC VALVES; TEMPERATURE RESPONSIVE ELECTRICAL SWITCHES; HYDROMETERS; GALVANOMETERS; VOLTMETERS; AMPEREMETERS; WATTMETERS; POTENTIOMETERS; GYROSCOPES; GYROMETERS; GYROGRAPHS; GYROSTABILIZERS; GLASSWARE FOR LABORATORY USE; ] OPTICAL LENSES; [ MAGNIFYING GLASSES; SPECTACLES; GOGGLES; FIELD, MARINE AND PERA GLASSES; PRISMS; GLASS AND METALLIC MIRRORS FOR LABORATORY USE; PARABOLIC, CONCAVE AND CONVEX REFLECTORS AND OPHTHALMOSCOPES; LIGHT ABSORBING FILTERS; COLORED GLAS SCREENS FOR OPTICAL AND PHOTOGRAPHIC APPARATUS; LIGHT MEASURING APPARATUS; GLARE REDUCING LENSES; OPTICAL FILTERS AND SCREENS ]