2651684

Information

• Patent Grant
• 2651684

• References
• Source

• Patent Number

  2,651,684

• Date Filed

  Not available

• Date Issued

  Tuesday, September 8, 1953
  71 years ago

• CPC

  • H04Q1/4535 - with an additional signal transmitted for voice protection

• US Classifications

  • 455 - Telecommunications
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 330 - Amplifiers