Animated display controlled by an audio device

Apparatus and method for automatically performing channel change

Apparatus for detecting tape running in a tape recorder

Audio circuit with noise muting feature

Audio-visual apparatus

Audio-visual presentation device

Audiovisual filmstrip image display apparatus and method using f

Cassette labeling apparatus

Control system for audio-visual projector

Control system for audio-visual projector

Controller for a numerically-controlled form-cutting machine

Data communication apparatus

Digital control system and method for the synchronization of aud

Digital logic control for audio visual programs and method there

Disk storage unit positioning control for applying DC offsets to

Laser operated scanning and printing system

Lead screw servo system controlled by a control track

Method and apparatus for controlling external devices and for tr

Method for recording a magnetic audio tape and apparatus for gen

Method for regaining synchronization between a visual image proj