3215788

Information

• Patent Grant
• 3215788

• References
• Source

• Patent Number

  3,215,788

• Date Filed

  Not available

• Date Issued

  Tuesday, November 2, 1965
  59 years ago

• CPC

  • H04B1/581 - using a transformer
  • H04B3/42 - Circuits for by-passing of ringing signals

• US Classifications

  • 379 - Telephonic communications