3924194

Information

• Patent Grant
• 3924194

• References
• Source

• Patent Number

  3,924,194

• Date Filed

  Not available

• Date Issued

  Tuesday, December 2, 1975
  49 years ago

• CPC

  • H04Q1/44 - using alternate current
  • H04M11/04 - with fire, police, burglar, or other alarm systems
  • H04Q9/10 - using single different frequencies

• US Classifications

  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 329 - Demodulators
  • 379 - Telephonic communications