Audio circuit with noise muting feature
Audio-visual apparatus
Audio-visual presentation device
Audiovisual filmstrip image display apparatus and method using f
Control system for audio-visual projector
Control system for audio-visual projector
Digital control system and method for the synchronization of aud
Digital logic control for audio visual programs and method there
Method for regaining synchronization between a visual image proj
Synchronized tape slide projector control system
Tape machine and slide projector synchronizing device
Video theater system