21 AUTOMATICALLY INITIATED SOUND REPRODUCER FOR USE IN INSTITUTIONS, BUILDINGS, ETC., SAID REPRODUCER INCLUDING AN ELECTRONIC AMPLIFIER CONNECTABLE WITH A LOUDSPEAKER AND SOURCES OF AUDIO-VIBRATIONS TO BE AMPLIFIED AND THE PARTS THEREOF FOR THE AFORESAID GOODS
MAR. 24, 1953, AS TO "TYME-STRYKE" MAR. 24, 1953, AS TO "TYME-STRYKE" TIME STRIKE