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  5. Audio recording and visual means
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Cards for spelling readout

Education and demonstration – Audio recording and visual means – Common carrier for visual means and audio recording
Patent

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Combination question-answer book and answer display

Education and demonstration – Audio recording and visual means
Patent

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Computer assisted interactive entertainment/educational characte

Education and demonstration – Audio recording and visual means
Patent

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Computer-based teaching apparatus

Education and demonstration – Audio recording and visual means
Patent

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