4. Data processing: vehicles, navigation, and relative location
  5. Vehicle control, guidance, operation, or indication
  6. Railway vehicle

Don Keith Johnson

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Intelligent communications, command, and control system for...

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Railway vehicle
Reexamination Certificate

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Signal error detection in railroad communication system

Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
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