4. Communications: electrical
  5. Traffic control indicator
  6. Plural intersections under common central station control

William L. May

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Actuated digital pretimed traffic controller

Communications: electrical – Traffic control indicator – Plural intersections under common central station control
Patent

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Base station for monitoring call boxes

Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent

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Bus networks for digital data processing systems and modules usa

Geometrical instruments
Patent

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Non-circular gauge reaming row inserts

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate

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