PHOTO RESEARCH
Electro-Optical Instruments and Devices for Measuring Radiant Energy in Scientific, Industrial, and Photographic Applications-, namely, Color Temperature Meters, [ Colorimeters, Reflectometers, Transmissometers, TV Cameras, Image Analyzers, Exposure Meters, Densitometers, Color Densitometers, Meter Testers, ] Light Filters; [ Viewing Glasses; ] Instruments for Photometry and Radiometry-, namely, Luminance Meters, Radiance Meters, Illuminance Meters, Irradiance Meters, Spectroradiometers, [ Ca...
Registered · July 9, 1982 · 73373846 ·