Sound transmitting, sound recording and sound reproducing apparatus, machines and instruments; and parts thereof and fittings therefor included in this class, including carries for magnetic sound recording, apparatus and other equipment for telegraphy, telephony, television and broadcasting as well as parts and accessories for such, microphones, telephones, loud speakers, amplifiers, galvanic elements, accumulators, switching or regulating apparatus as well as tension fuses or current fuses, measuring instruments and meters, apparatus and appliances for electric illumination, elctor-magnets, rlays, vacuum tubes, x-ray apparatus for electo- and radio therapy, mathematical, geodetical and nautical instruments as well as technical instruments for artillery use; and other technical instruments, measures and weights, optical instruments and apparatus, lenses and lens systems, prisms, mirrors for scientific purposes, Searchlights, field glasses, microscopes, magnifying glasses, micrometers, photmeters, calorimeters, spectral, ploarization and projection apparatus, stereoscopes, kaleidoscopes, spectacles and eye-glasses, apparatus for cinematography and sound film, signalling devices for maritime and aerial navigation, drawing instruments, scientific devices and apparatus for remote control.