3872436

Information

• Patent Grant
• 3872436

• References
• Source

• Patent Number

  3,872,436

• Date Filed

  Not available

• Date Issued

  Tuesday, March 18, 1975
  49 years ago

• CPC

  • H04Q1/30 - Signalling arrangements Manipulation of signalling currents
  • H04Q1/38 - using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
  • Y10T307/658 - Diverse or unlike electrical characteristics

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 340 - Communications: electrical