4. Telephonic communications
  5. Centralized switching system
  6. Call distribution to operator

William R. Quayle

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Method and system for establishing voice communications using a

Telephonic communications – Centralized switching system – Call distribution to operator
Patent

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Method and system for establishing voice communications...

Telephonic communications – Centralized switching system – Call distribution to operator
Reexamination Certificate

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Method and system for establishing voice communications...

Telephonic communications – Centralized switching system – Call distribution to operator
Reexamination Certificate

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Method and system for establishing voice communications...

Telephonic communications – Centralized switching system – Call distribution to operator
Reexamination Certificate

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