2900621

Information

• Patent Grant
• 2900621

• References
• Source

• Patent Number

  2,900,621

• Date Filed

  Not available

• Date Issued

  Tuesday, August 18, 1959
  65 years ago

• CPC

  • H04Q9/12 - using combinations of frequencies

• US Classifications

  • 340 - Communications: electrical
  • 370 - Multiplex communications