3187234

Information

• Patent Grant
• 3187234

• References
• Source

• Patent Number

  3,187,234

• Date Filed

  Not available

• Date Issued

  Tuesday, June 1, 1965
  59 years ago

• CPC

  • H04Q1/4423 - using one signalling frequency

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 340 - Communications: electrical