73037179
Nov 15, 1974
Mar 2, 1976
SIGNAL ACTUATED ELECTRICAL SOUND RECORDING AND REPRODUCING MESSAGE ANNOUNCEMENT APPARATUS USEFUL FOR PERIODIC MESSAGE ANNOUNCEMENTS SUCH AS "TIME OF DAY," CURRENT TEMPERATURE, WEATHER REPORTS, AND THE LIKE; FOR RECORDED ANNOUNCEMENT MESSAGE CIRCUIT TRAFFIC LOAD DETECTOR APPARATUS; AND FOR RELATED EQUIPMENT AND ACCESSORIES
Electrical and Scientific Apparatus