4. Dynamic magnetic information storage or retrieval
  5. General recording or reproducing
  6. Recording-or erasing-prevention

Tatsuro Shirai

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Apparatus and method for recording and reproducing a digital sig

Dynamic magnetic information storage or retrieval – General recording or reproducing – Recording-or erasing-prevention
Patent

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Headphone with cord winder devices

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Reexamination Certificate

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Headphone with cord winder devices

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1287686

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