2230681

Information

• Patent Grant
• 2230681

• References
• Source

• Patent Number

  2,230,681

• Date Filed

  Not available

• Date Issued

  Tuesday, February 4, 1941
  84 years ago

• CPC

  • H04L25/42 - using mechanical distributors
  • H04L25/207 - using electromagnetic switches

• US Classifications

  • 178 - Telegraphy
  • 361 - Electricity: electrical systems and devices