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

Douglas C. Hansen

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Method and system for reading data that is unreadable by a tape

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

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Method for utilizing a longitudinal track on a helical scan tape

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

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Partial response maximum likelihood (PRML) detection trellis...

Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1343420

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