TANNOY
[ ELECTRIC SIGNALLING AND ALARM APPARATUS AND PARTS THEREOF, FOR USE IN FIRE, BURGLAR, AIR RAID AND SIMILAR ALARM SYSTEMS, EMPLOYING EITHER VISUAL OR AUDIBLE SIGNALS; TELEPHONE SYSTEMS AND APPARATUS, AND PARTS THEREOF; TRANSMITTING AND RECEIVING TELEPHONE AND RADIO APPARATUS, AND PARTS THEREOF; ] ELECTRIC PUBLIC ADDRESS AMPLIFYING AND REPRODUCING APPARATUS, INCLUDING ELECTRIC AMPLIFIERS, [ MICROPHONES, ] LOUDSPEAKERS, [ GRAMOPHONE PICK-UPS AND ELECTRIC SWITCHES; PHOTOELECTRIC APPARATUS COMPR...
Registered · May 24, 1943 · 71460868 ·