4. Communications: electrical
  5. Selective
  6. Having indication or alarm

Leonard A. Stein

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Electronically controlled safety mechanism for highway exit ramp

Communications: electrical – Selective – Having indication or alarm
Patent

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Safety mechanism for highway exit ramp

Movable or removable closures – With traffic director or controller; e.g. – one-way
Patent

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Profile ID: LFUS-PAI-P-1590627

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