LandOfFree - US Patents - Listing for Education and demonstration,Audio recording,Operation of apparatus controlled by listener's response to...

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Electrical educational device

Education and demonstration – Audio recording – Operation of apparatus controlled by listener's response to...

Patent

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Interactive audio teaching aid

Education and demonstration – Audio recording – Operation of apparatus controlled by listener's response to...

Patent

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Interactive responsive apparatus with visual indicia, command co

Education and demonstration – Audio recording – Operation of apparatus controlled by listener's response to...

Patent

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Methods for controlling reciting time of language learning devic

Education and demonstration – Audio recording – Operation of apparatus controlled by listener's response to...

Patent

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Multiple segment nonsequential recording

Education and demonstration – Audio recording – Operation of apparatus controlled by listener's response to...

Patent

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Multiple segment nonsequential recording

Education and demonstration – Audio recording – Operation of apparatus controlled by listener's response to...

Patent

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Real-time interactive conversational apparatus

Education and demonstration – Audio recording – Operation of apparatus controlled by listener's response to...

Patent

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Real-time interactive conversational toy

Education and demonstration – Audio recording – Operation of apparatus controlled by listener's response to...

Patent

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Teaching machine

Education and demonstration – Audio recording – Operation of apparatus controlled by listener's response to...

Patent

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Teaching system using prerecorded tape

Education and demonstration – Audio recording – Operation of apparatus controlled by listener's response to...

Patent

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Teaching system utilizing magnetic tape

Education and demonstration – Audio recording – Operation of apparatus controlled by listener's response to...

Patent

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