2807669

Information

• Patent Grant
• 2807669

• References
• Source

• Patent Number

  2,807,669

• Date Filed

  Not available

• Date Issued

  Tuesday, September 24, 1957
  69 years ago

• CPC

  • H04Q5/00 - Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
  • H04Q3/0008 - using relay selectors in the switching stages

• US Classifications

  • 379 - Telephonic communications