3474451

Information

• Patent Grant
• 3474451

• References
• Source

• Patent Number

  3,474,451

• Date Filed

  Not available

• Date Issued

  Tuesday, October 21, 1969
  56 years ago

• CPC

  • H04B5/06 - using a portable transmitter associated with a microphone
  • G09B5/12 - different stations being capable of presenting different information simultaneously
  • H04B5/0093 - with one coil at each side
  • H04J1/20 - in which at least one carrier is angle-modulated

• US Classifications

  • 370 - Multiplex communications
  • 381 - Electrical audio signal processing systems and devices
  • 434 - Education and demonstration
  • 455 - Telecommunications