2413620

Information

• Patent Grant
• 2413620

• References
• Source

• Patent Number

  2,413,620

• Date Filed

  Not available

• Date Issued

  Tuesday, December 31, 1946
  78 years ago

• CPC

  • G01S1/22 - the synchronised signals being frequency modulations on carrier waves and the transit times being compared by measuring difference of instantaneous frequencies of received carrier waves
  • G01S1/02 - using radio waves

• US Classifications

  • 342 - Communications: directive radio wave systems and devices
  • 367 - Communications, electrical: acoustic wave systems and devices