4. Dynamic magnetic information storage or retrieval
  5. Record transport with head stationary during transducing
  6. Drum record

Donald S. Perry

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Disk drive assembly tool

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

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Fiber chopper

Solid material comminution or disintegration – Processes – Subjecting material to impact by moving comminuting surface
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1975121

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