3781686

Information

• Patent Grant
• 3781686

• References
• Source

• Patent Number

  3,781,686

• Date Filed

  Not available

• Date Issued

  Tuesday, December 25, 1973
  51 years ago

• CPC

  • H03M3/04 - Differential modulation with several bits
  • H04B14/066 - using differential modulation with several bits [NDPCM]

• US Classifications

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