2853553

Information

• Patent Grant
• 2853553

• References
• Source

• Patent Number

  2,853,553

• Date Filed

  Not available

• Date Issued

  Tuesday, September 23, 1958
  66 years ago

• CPC

  • H04Q3/0008 - using relay selectors in the switching stages
  • H04M15/08 - Metering calls to called party
  • H04Q3/58 - Arrangements providing connection between main exchange and sub-exchange or satellite

• US Classifications

  • 379 - Telephonic communications