73655607
Apr 16, 1987
Dec 1, 1987
WIRELESS MICROPHONE SYSTEM COMPRISING A PORTABLE BATTERY OPERATED FM TRANSMITTER AND MICROPHONE THEREFOR, AND FM RECEIVER WITH AUDIO SIGNAL OUTPUT; HEARING ASSISTANCE TRANSMITTER SYSTEM, COMPRISING A STATIONARY FM RADIO TRANSMITTER, A BATTERY POWERED PORTABLE FM RADIO RECEIVER, AND AN EARPHONE
Electrical and Scientific Apparatus