4. Dynamic magnetic information storage or retrieval
  5. Automatic control of a recorder mechanism

John Mark Mackelden

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Data storage apparatus and method

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism
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Data structure, data storage apparatus and method

Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data in specific format
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Data transfer apparatus head cleaning

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism
Reexamination Certificate

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Data transfer apparatus head cleaning

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism
Reexamination Certificate

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