3798379

Information

• Patent Grant
• 3798379

• References
• Source

• Patent Number

  3,798,379

• Date Filed

  Not available

• Date Issued

  Tuesday, March 19, 1974
  50 years ago

• CPC

  • H04Q3/625 - Arrangements in the private branch exchange
  • H04Q1/32 - using trains of dc pulses

• US Classifications

  • 379 - Telephonic communications