3544723

Information

• Patent Grant
• 3544723

• References
• Source

• Patent Number

  3,544,723

• Date Filed

  Not available

• Date Issued

  Tuesday, December 1, 1970
  54 years ago

• CPC

  • H04Q1/4465 - the same frequency being used for all signalling information

• US Classifications

  • 370 - Multiplex communications
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 329 - Demodulators
  • 340 - Communications: electrical
  • 379 - Telephonic communications