2503782

Information

• Patent Grant
• 2503782

• References
• Source

• Patent Number

  2,503,782

• Date Filed

  Not available

• Date Issued

  Tuesday, April 11, 1950
  74 years ago

• CPC

  • H04B1/50 - using different frequencies for the two directions of communication
  • H03D7/1416 - with discharge tubes having more than two electrodes
  • H04B1/44 - Transmit/receive switching
  • H04B1/46 - by voice-frequency signals by pilot signals

• US Classifications

  • 370 - Multiplex communications
  • 455 - Telecommunications