3716857

Information

• Patent Grant
• 3716857

• References
• Source

• Patent Number

  3,716,857

• Date Filed

  Not available

• Date Issued

  Tuesday, February 13, 1973
  51 years ago

• CPC

  • G01S13/787 - co-operating with direction defining beacons

• US Classifications

  • 342 - Communications: directive radio wave systems and devices