2431167

Information

• Patent Grant
• 2431167

• References
• Source

• Patent Number

  2,431,167

• Date Filed

  Not available

• Date Issued

  Tuesday, November 18, 1947
  77 years ago

• CPC

  • H04W88/188 - using frequency address codes
  • H04L15/26 - Operating only on reception of predetermined code signals

• US Classifications

  • 455 - Telecommunications
  • 340 - Communications: electrical
  • 361 - Electricity: electrical systems and devices