3728728

Information

• Patent Grant
• 3728728

• References
• Source

• Patent Number

  3,728,728

• Date Filed

  Not available

• Date Issued

  Tuesday, April 17, 1973
  51 years ago

• CPC

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

• US Classifications

  • 342 - Communications: directive radio wave systems and devices