4. Dynamic magnetic information storage or retrieval
  5. General recording or reproducing
  6. Specifics of biasing or erasing

Grant S. Christiansen

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Disk drive employing a sync mark detector comprising a...

Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Reexamination Certificate

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Disk drive for detecting a polarity error of a...

Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Reexamination Certificate

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Disk drive that discerns the polarity of a head signal from...

Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Reexamination Certificate

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