3721983

Information

• Patent Grant
• 3721983

• References
• Source

• Patent Number

  3,721,983

• Date Filed

  Not available

• Date Issued

  Tuesday, March 20, 1973
  53 years ago

• CPC

  • H01Q1/082 - Balloon antennas
  • G08B5/002 - Distress signalling devices

• US Classifications

  • 342 - Communications: directive radio wave systems and devices
  • 116 - Signals and indicators