3400218

Information

• Patent Grant
• 3400218

• References
• Source

• Patent Number

  3,400,218

• Date Filed

  Not available

• Date Issued

  Tuesday, September 3, 1968
  56 years ago

• CPC

  • B61L7/088 - Common line wire control using series of coded pulses
  • H04Q9/14 - Calling by using pulses

• US Classifications

  • 398 - Optical communications
  • 250 - Radiant energy
  • 379 - Telephonic communications