4. Communications: electrical
  5. Land vehicle alarms or indicators
  6. External signal light system

B. R. Tumm

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Braking indicator system

Communications: electrical – Land vehicle alarms or indicators – External signal light system
Patent

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Pedestrian crossing safety apparatus

Communications: electrical – Traffic control indicator – Portable
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U-turn signal attachment

Communications: electrical – Land vehicle alarms or indicators – External signal light system
Patent

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