2212256

Information

• Patent Grant
• 2212256

• References
• Source

• Patent Number

  2,212,256

• Date Filed

  Not available

• Date Issued

  Tuesday, August 20, 1940
  84 years ago

• CPC

  • H04H20/81 - combined with telephone network over which the broadcast is continuously available
  • B64D17/54 - automatic
  • H04Q1/14 - Distribution frames
  • B64D2700/6257 - Opening induced by means other than airstream

• US Classifications

  • 370 - Multiplex communications
  • 455 - Telecommunications