Title	Patent Filing Date
Sound track unit for audio-visual apparatus	1973-12-05
Audio-visual learning system	1973-04-18
Audio amplifier systems	1974-07-29
Automated audio health history acquisition system	1973-11-23
System for magnetically recording and reproducing still video pictures and audio information	1968-07-31
Audio-visual apparatus with control signal operated gating means	1974-01-10
Multipurpose audio-visual cassette method	1974-08-05
Circuit having audio output pulse rate related to measured resistance and output pulse modulation related to measured capacitance	1974-04-15
Dictation system for storing and retrieving audio information	1973-12-26
Control circuit for a matrixed four channel audio reproducing system	1974-09-06
Power supply switching circuit for combined audio system	1974-09-13
System for recording and playing back individual frames of video and related audio signals	1972-10-13
Multipurpose audio-visual cassette system	1974-08-05
Interactive audio-visual instruction device	1973-12-28
Audio signal mixing system	1974-02-11
Audio-visual system including audio-visual slides	1972-05-22
Interactive audio-visual apparatus	1973-12-05
Audio apparatus	1974-11-21
Audio-visual apparatus and method of using the apparatus for obtaining computer compatible data from an individual	1974-03-20
Audio tachometer system	1974-09-20
Audio signal time-duration converter	1974-09-25
Fading audio-level controls for sound-recording motion picture cameras	1974-10-18
Dental light reflector and visual-audio analgesic assembly	1975-01-22
Automatic audio source selector for stereo entertainment center	1974-10-02
Audio processor circuit for an FM-stereo radio receiver	1974-10-21
Reset mechanism for an audio-visual device	1974-06-05
Audio speaker system	1972-05-08
Electric therapeutical apparatus with audio frequency band alternating current	1974-07-17
Multiplex transmission of television audio-visual signals	1974-03-28
Balance control system for multichannel audio apparatus	1974-12-19
Arrangement and method for the localized self-control of randomly allotted time slots to audio ports	1974-07-01
Power supply for an audio-video recording system	1975-04-18
Multi-cartridge apparatus for recording and reproducing audio signals automatically and successively	1973-12-18
Audio pan generator	1974-11-29
Modular control panel device for audio-visual receiving apparatus	1975-05-02
Voice controlled disappearing audio delay line	1975-05-27
Automatic control system for condition-responsively switching over transceiver and radio or tape recorder audio signals	1975-03-07
Transmission of video pictures at audio frequencies	1975-04-18
Audio dosimeter	1974-11-11
System for preventing erasure of audio recordings	1975-05-23
Digital control system and method for the synchronization of audio-visual equipment	1974-03-13
Motion picture projector device as audio-visual aid and audio-visual system using the same	1974-06-03
Audio-visual slide projection system	1975-07-29
Audio-visual display device	1972-07-27
Cooling system for an audio visual device	1975-01-09
Bias control circuit for an audio amplifier utilizing an unsaturated junction type FET	1975-12-22
Audio frequency signalling systems for telephone systems	1975-02-10
Receiver system for receiving audio electrical signals	1975-04-21
Audio compressor/limiter amplifier	1975-06-30
Transmit-receive switching circuit with audio muting	1975-11-10