2991449

Information

• Patent Grant
• 2991449

• References
• Source

• Patent Number

  2,991,449

• Date Filed

  Not available

• Date Issued

  Tuesday, July 4, 1961
  63 years ago

• CPC

  • H04M3/523 - with call distribution or queueing
  • H04Q3/0008 - using relay selectors in the switching stages

• US Classifications

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