73724061
Apr 22, 1988
Mar 14, 1989
[ NON-VOICE RADIO TRANSMITTERS USED IN SCHOOL OR OTHER BUSES AND RADIO RECEIVERS USED IN DWELLINGS AND OTHER LOCATIONS TO RECEIVE THE SIGNALS TRANSMITTED ] * A SYSTEM FOR ALERTING PASSENGERS THAT THE PARTICULAR BUS THEY ARE TO BARD IS APPROACHING COMPRISED OF RADIO TRANSMITTERS USED IN SCHOOL OR OTHER BUSES AND/OR RADIO RECEIVERS USED IN DWELLINGS AND OTHER LOCATIONS TO RECEIVE THE SIGNALS TRANSMITTED *
Electrical and Scientific Apparatus