2249103

Information

• Patent Grant
• 2249103

• References
• Source

• Patent Number

  2,249,103

• Date Filed

  Not available

• Date Issued

  Tuesday, July 15, 1941
  83 years ago

• CPC

  • H04M3/02 - Ringing or otherwise calling substations
  • H04L41/06 - involving management of faults or events or alarms
  • H04L43/0811 - Connectivity
  • H04L41/0681 - involving configuration of triggering conditions
  • H04M5/12 - Ringing or otherwise calling substations
  • H04M2201/08 - Magnetic elements
  • H04M2201/10 - Logic circuits

• US Classifications

  • 178 - Telegraphy