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Method of recording and reproducing subliminal signals that are

Education and demonstration – Audio recording
Patent

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Method of teaching/learning a part of a multi-part musical compo

Education and demonstration – Audio recording
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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Multi-purpose, universally applicable re-recordable, audible, me

Education and demonstration – Audio recording
Patent

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Multi-purpose, universally applicable re-recordable, audible, me

Education and demonstration – Audio recording
Patent

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Multimode recording and transmitting apparatus and its use...

Education and demonstration – Audio recording
Reexamination Certificate

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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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Musical cube

Education and demonstration – Audio recording
Reexamination Certificate

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