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Akio Nishiyama

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Magnetic recording and reproducing apparatus

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Patent

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Signal recording and reproducing apparatus and signal...

H - Electricity – 04 – N
Patent

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System for synchronizing sounds with learning materials

G - Physics – 09 – B
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Video tape recorder in which the drum is rotated...

G - Physics – 11 – B
Patent

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Profile ID: LFCA-PAI-P-25547

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