Audio visual apparatus and method
Audio-visual teaching machine
Audio-visual teaching machine and control system therefor
Cards for spelling readout
Device for displaying multiple scenes animated by sequences...
Device for identifying an object using an omnidirectional bar co
Educational audio playback device including hidden graphical ima
Electric self-teaching apparatus utilizing printed and auditory
Electrical flash card unit and method of use
Interactive educational device
Interactive talking picture machine
Interactive talking picture machine
Personal learning system
Position-sensitive educational product
Presentation apparatus
Process of human-machine interactive educational instruction usi
Synchronized teaching mobile
System for initialization of an image holder that stores images
Teaching machine
Touch sensor alpha-numeric blocks