4. Dynamic magnetic information storage or retrieval
  5. General processing of a digital signal
  6. Head amplifier circuit

Shinji Umehara

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Apparatus capable of data reproduction from digital tape cassett

Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent

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Data recording/reproducing system using optical disk apparatus

Electrical computers and digital processing systems: support – Computer power control – Power conservation
Reexamination Certificate

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Method and apparatus for moving head from one tape track to anot

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent

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Profile ID: LFUS-PAI-P-211915

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