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

Richard W. McKee

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Electrical apparatus cover plate

Electricity: conductors and insulators – Covers or face plates – With closure for face plate opening
Patent

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Electrical cord-retaining apparatus

Geometrical instruments
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Slide cam assembly for railroad-crossing gate mechanism

Railway switches and signals – Electric automatic highway signals – mine doors – and gates
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Profile ID: LFUS-PAI-P-406513

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