3900868

Information

• Patent Grant
• 3900868

• References
• Source

• Patent Number

  3,900,868

• Date Filed

  Not available

• Date Issued

  Tuesday, August 19, 1975
  49 years ago

• CPC

  • G01S13/70 - for range tracking only
  • G01S13/787 - co-operating with direction defining beacons

• US Classifications

  • 342 - Communications: directive radio wave systems and devices