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

Peter F. Theis

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Anticipatory call distributor

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

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Automatic area code detector and dialer

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Automatic area code detector and dialer

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Automatic area code detector and dialer for automatically...

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Conversational telephone call distributor

Patent

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Profile ID: LFUS-PAI-P-299269

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