3721981

Information

• Patent Grant
• 3721981

• References
• Source

• Patent Number

  3,721,981

• Date Filed

  Not available

• Date Issued

  Tuesday, March 20, 1973
  51 years ago

• CPC

  • G01S13/16 - using counters

• US Classifications

  • 342 - Communications: directive radio wave systems and devices