AO

GROUP A: BALLISTIC SCIENTIFIC AND BALLISTIC LABORATORY APPARATUS; BIBLIOFILM PROJECTORS; SLIDE, FILM, AND OPAQUE PROJECTORS; OPTICAL INSTRUMENTS FOR EXAMINING AND COUNTING PARTICLES IN BLOOD, URINE, MILK, AND MOLD: CAMERA LUCIDAS; COLORIMETER; OPTICAL PROJECTION PROFILE COMPARATORS; MICROSCOPE ILLUMINATORS; FINGER PRINT MAGNIFIERS; GONIOMETERS; HAEMACYTOMETERS; HEMOGLOBINOMETERS; MECHANICAL HARDNESS TESTERS; MECHANICAL AND OPTICAL MICROMETERS; MICROSCOPE TELESCOPE, CONDENSING, PHOTOGRAPHIC, AND PROJECTION LENSES; MICROTOMES; MICROTOME KNIVES; SPECTROMETERS; REFRACTOMETERS; MICROSCOPES; PHOTOMICROGRAPHIC APPARATUS AND LENSES; LIGHT POLARIZING APPARATUS; ROOF, PORRO, AMICI, HEAD, CONSTANT DEVIATION, AND SPECIAL BORE SIGHTING OPTICAL PRISMS; SPECTROMETERS; LABORATORY TISSUE FREEZERS; GROUP B: OPHTHALMIC ABSORPTIVE LENSES; OPHTHALMIC APHAKIC LENSES; LENSES FOR USE IN DETERMINING SIZE ERRORS OF THE EYES AND FOR THE CORRECTION OF SUCH SIZE ERRORS; HARDENED OPHTHALMIC LENSES LENSES FOR PROTECTING THE EYES; LENSES AND TRANSPARENT PLATES FOR WELDING HELMETS AND SHIELDS; LENS CENTERING INSTRUEMNTS; AND, GROUP C: INSTRUMENTS FOR PHOTOGRAPHING EYE MOVEMENT