2581444

Information

• Patent Grant
• 2581444

• References
• Source

• Patent Number

  2,581,444

• Date Filed

  Not available

• Date Issued

  Tuesday, January 8, 1952
  72 years ago

• CPC

  • H01Q21/18 - H-type
  • G01S1/02 - using radio waves

• US Classifications

  • 342 - Communications: directive radio wave systems and devices
  • 343 - Communications: radio wave antennas