3894192

Information

• Patent Grant
• 3894192

• References
• Source

• Patent Number

  3,894,192

• Date Filed

  Not available

• Date Issued

  Tuesday, July 8, 1975
  49 years ago

• CPC

  • H04M7/0096 - Trunk circuits
  • H04Q1/38 - using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

• US Classifications

  • 379 - Telephonic communications