2193427

Information

• Patent Grant
• 2193427

• References
• Source

• Patent Number

  2,193,427

• Date Filed

  Not available

• Date Issued

  Tuesday, March 12, 1940
  84 years ago

• CPC

  • H01H47/14 - for differential operation of the relay

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 379 - Telephonic communications