1392630

Information

• Patent Grant
• 1392630

• References
• Source

• Patent Number

  1,392,630

• Date Filed

  Not available

• Date Issued

  Tuesday, October 4, 1921
  103 years ago

• CPC

  • B61L19/023 - purely mechanical

• US Classifications

  • 246 - Railway switches and signals
  • 200 - Electricity: circuit makers and breakers