3281693

Information

• Patent Grant
• 3281693

• References
• Source

• Patent Number

  3,281,693

• Date Filed

  Not available

• Date Issued

  Tuesday, October 25, 1966
  58 years ago

• CPC

  • H04Q1/4423 - using one signalling frequency
  • H04M11/06 - Simultaneous speech and telegraphic or other data transmission over the same conductors

• US Classifications

  • 375 - Pulse or digital communications
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 379 - Telephonic communications
  • 455 - Telecommunications