3898582

Information

• Patent Grant
• 3898582

• References
• Source

• Patent Number

  3,898,582

• Date Filed

  Not available

• Date Issued

  Tuesday, August 5, 1975
  49 years ago

• CPC

  • G08C19/14 - using combination of fixed frequencies
  • H03B5/26 - frequency-determining element being part of bridge circuit in closed ring around which signal is transmitted frequency-determining element being connected via a bridge circuit to such a closed ring
  • H04L27/26 - Systems using multi-frequency codes

• US Classifications

  • 331 - Oscillators
  • 340 - Communications: electrical