4. Dynamic magnetic information storage or retrieval
  5. Record copying

William McEwen

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Antimony and tin containing compound, use of such a compound as

Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
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Tape duplexing with unique identity and error recovery

Dynamic magnetic information storage or retrieval – Record copying
Patent

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Profile ID: LFUS-PAI-P-1346117

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