2640188

Information

• Patent Grant
• 2640188

• References
• Source

• Patent Number

  2,640,188

• Date Filed

  Not available

• Date Issued

  Tuesday, May 26, 1953
  71 years ago

• CPC

  • H04Q1/32 - using trains of dc pulses
  • G08C19/18 - using a variable number of pulses in a train

• US Classifications

  • 340 - Communications: electrical