3872471

Information

• Patent Grant
• 3872471

• References
• Source

• Patent Number

  3,872,471

• Date Filed

  Not available

• Date Issued

  Tuesday, March 18, 1975
  49 years ago

• CPC

  • G08B3/10 - using electric transmission using electromagnetic transmission
  • G10K1/065 - for timed or repeated operation

• US Classifications

  • 340 - Communications: electrical