4. Telephonic communications
  5. Supervisory or control line signaling
  6. Substation originated
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Rapid dialing method for telecommunications

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

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Rapid telephone call methods and systems

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

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Redial apparatus and methods for processing symbols input by a u

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

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Redialing method by editing telephone number in telephone termin

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

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Remote telephone call notification system

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

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Remotely programmable, vandal-resistant voice communications uni

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

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Remotely programmable, vandal-resistant voice communications uni

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

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Remotely programmable, vandal-resistant voice communications uni

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

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Removable button for a keypad

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

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