4. Telephonic communications
  5. Supervisory or control line signaling
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Network-based timed ring suppression

Telephonic communications – Supervisory or control line signaling – Signal reception at substation
Reexamination Certificate

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Non volatile automatic telephone dialer circuit

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

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Non-voice signal repeater for speech coders

Telephonic communications – Supervisory or control line signaling – Signal receiver
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Non-volatile automatic telephone number dialer circuit

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Number keypad corral

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0
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