3917913

Information

• Patent Grant
• 3917913

• References
• Source

• Patent Number

  3,917,913

• Date Filed

  Not available

• Date Issued

  Tuesday, November 4, 1975
  49 years ago

• CPC

  • H04Q1/32 - using trains of dc pulses
  • H04Q1/457 - with conversion of multifrequency signals into digital signals

• US Classifications

  • 379 - Telephonic communications