3893121

Information

• Patent Grant
• 3893121

• References
• Source

• Patent Number

  3,893,121

• Date Filed

  Not available

• Date Issued

  Tuesday, July 1, 1975
  49 years ago

• CPC

  • G08C19/14 - using combination of fixed frequencies
  • H04L27/10 - Frequency-modulated carrier systems

• US Classifications

  • 340 - Communications: electrical
  • 341 - Coded data generation or conversion