3187104

Information

• Patent Grant
• 3187104

• References
• Source

• Patent Number

  3,187,104

• Date Filed

  Not available

• Date Issued

  Tuesday, June 1, 1965
  60 years ago

• CPC

  • H04Q3/00 - Selecting arrangements
  • H04B3/40 - Artificial lines Networks simulating a line of certain length
  • H04B3/42 - Circuits for by-passing of ringing signals
  • H04B3/44 - Arrangements for feeding power to a repeater along the transmission line
  • H04M3/40 - Applications of speech amplifiers

• US Classifications

  • 379 - Telephonic communications