Apparatus and instruments to scientific and laboratory purposes, navigation apparatus and instruments, apparatus and instruments intended for transmission of commands, to measurement and apparatus generally used at control of boats and planes, geodetic apparatus and instruments and instruments for wireless telegraphy, photographic, cinematographic, optical apparatus, including projectors of image and enlargers, apparatus and instruments to weighing and measurement, signal apparatus and instruments including signal whistles, apparatus and instruments for rescue and instructional purposes, coin operating automats operating by dropping coin or imprints, apparatus for record and reproduction of spoken word, calculating machines including office, fire-extinguishers, special cases for apparatus and instruments, that are included in this class, computer equipment
Electrical and Scientific Apparatus