Search
Selected: C

Circuit and method for detecting telephone line status and telep

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit arrangement for a telephone station with earth connectio

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit arrangement for a telephone station with ground connecti

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit arrangement for echo suppression

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit arrangement for generating an acoustic ringing signal in

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit arrangement for the connection of line circuits of a dig

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit device for controlling the actuated state of an electric

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit for detecting current variations

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit for detection of off-hook condition of extension telepho

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit for evaluating call signals in a telecommunication syste

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit for reducing voltage peak in interfacing with a...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit for sensing telephone line conditions

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit for surge voltage protection in electronic telephone sta

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit for transmitting voice signals and dial pulses

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuit to detect the hook status and ringing at the CPE end of

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Circuitry for recognizing two-tone compound signals in telephone

Telephonic communications – Supervisory or control line signaling – Signal receiver
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Cleaning method for telephone number list and system...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Combined keypad and protective cover

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Combined loop current sink, battery detector, and ringing detect

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Combined writing and signaling instrument

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0
  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.