3917906

Information

• Patent Grant
• 3917906

• References
• Source

• Patent Number

  3,917,906

• Date Filed

  Not available

• Date Issued

  Tuesday, November 4, 1975
  50 years ago

• CPC

  • H04N7/081 - the additional information signals being transmitted by means of a subcarrier
  • H04J1/04 - Frequency-transposition arrangements
  • H04J1/08 - Arrangements for combining channels
  • H04J1/20 - in which at least one carrier is angle-modulated

• US Classifications

  • 370 - Multiplex communications
  • 348 - Television
  • 455 - Telecommunications