4. Railway switches and signals
  5. Electric automatic highway signals, mine doors, and gates

Gerhard F. Meyer

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System and method for train operation approaching grade...

Railway switches and signals – Electric automatic highway signals – mine doors – and gates
Reexamination Certificate

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Virtual lock stepping in a vital processing environment for...

Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
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Profile ID: LFUS-PAI-P-3249401

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