Apparatus for automatically synchronizing the operation of a dev
Appointment calendaring clock
Audio tape player driver information device
Automatic message announcement system
Automatic telephone answering apparatus
Door actuated message device
Electronic reminder system
Electronic reminder system
Language information system
Light switch cover plate with audio recording and playback featu
Light switch cover plate with audio recording and playback...
Magnetic head with full and partial coils for azimuth informatio
Magnetic tape cassette with door opening mechanism
Merchandising device having recording selection and display
Message synthetizer
Point of purchase advertising system
Point of purchase automatically-actuated audio advertising devic
Point of sale automatic announcing system with preprogrammed cap
Process timer
Programmed conversation recording system