3930127

Information

• Patent Grant
• 3930127

• References
• Source

• Patent Number

  3,930,127

• Date Filed

  Not available

• Date Issued

  Tuesday, December 30, 1975
  49 years ago

• CPC

  • H04Q1/446 - using one signalling frequency

• US Classifications

  • 379 - Telephonic communications
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 330 - Amplifiers