3618083

Information

• Patent Grant
• 3618083

• References
• Source

• Patent Number

  3,618,083

• Date Filed

  Not available

• Date Issued

  Tuesday, November 2, 1971
  53 years ago

• CPC

  • H04K3/88 - related to allowing or preventing alarm transmission
  • G01S13/56 - for presence detection
  • G08B13/24 - by interference with electromagnetic field distribution
  • H04K3/22 - including jamming detection and monitoring

• US Classifications

  • 342 - Communications: directive radio wave systems and devices
  • 340 - Communications: electrical