3821484

Information

• Patent Grant
• 3821484

• References
• Source

• Patent Number

  3,821,484

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  50 years ago

• CPC

  • H04Q11/0407 - using a stored programme control
  • H04Q1/30 - Signalling arrangements Manipulation of signalling currents

• US Classifications

  • 370 - Multiplex communications
  • 379 - Telephonic communications