73117356
Feb 28, 1977
Sep 12, 1978
SOUND REPRODUCTION EQUIPMENT-NAMELY, RECORDERS, TRANSMITTERS, RECEIVERS, AMPLIFIERS, TELEPHONIC ELECTRONIC ANNUNICATORS AND CALL SYSTEMS FOR USE IN FACTORIES AND THE LIKE, PUBLIC ADDRESS SYSTEMS AND AUDITORIUM SPEAKERS, AMPLIFYING UNITS AND SPEAKER UNITS THEREFOR, AND PARTS THEREOF, PHONOGRAPHS, TUNERS, BOOSTERS, PICKUPS, SPEAKERS, MICROPHONES, RECORD PLAYERS AND HEADPHONES
Electrical and Scientific Apparatus