3144607

Information

• Patent Grant
• 3144607

• References
• Source

• Patent Number

  3,144,607

• Date Filed

  Not available

• Date Issued

  Tuesday, August 11, 1964
  60 years ago

• CPC

  • H04B3/42 - Circuits for by-passing of ringing signals

• US Classifications

  • 455 - Telecommunications