4. Dynamic magnetic information storage or retrieval
  5. Automatic control of a recorder mechanism
  6. Controlling the record

Donn A. Hopkins

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Disk drive with reduced power modes

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

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Magnetic disk memory head carriage assembly employing backlash-f

Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
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