3840877

Information

• Patent Grant
• 3840877

• References
• Source

• Patent Number

  3,840,877

• Date Filed

  Not available

• Date Issued

  Tuesday, October 8, 1974
  50 years ago

• CPC

  • G01S1/06 - Means for providing multiple indication
  • G01S1/02 - using radio waves

• US Classifications

  • 342 - Communications: directive radio wave systems and devices
  • 340 - Communications: electrical