4. Dynamic magnetic information storage or retrieval
  5. Recorder control of an external device
  6. Slide or movie projectors

Robert E. Grant

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Audio-visual presentation device

Dynamic magnetic information storage or retrieval – Recorder control of an external device – Slide or movie projectors
Patent

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Input/output module providing mixed optical and electrical signa

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
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Profile ID: LFUS-PAI-P-1443191

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