3398239

Information

• Patent Grant
• 3398239

• References
• Source

• Patent Number

  3,398,239

• Date Filed

  Not available

• Date Issued

  Tuesday, August 20, 1968
  56 years ago

• CPC

  • H04L27/26 - Systems using multi-frequency codes
  • H04B14/002 - characterised by the use of a carrier modulation
  • H04L5/02 - Channels characterised by the type of signal
  • H04L5/04 - the signals being represented by different amplitude or polarities
  • H04L5/06 - the signals being represented by different frequencies
  • H04L25/4917 - using multilevel codes
  • H04L27/06 - Demodulator circuits Receiver circuits

• US Classifications

  • 375 - Pulse or digital communications
  • 341 - Coded data generation or conversion