1768640

Information

• Patent Grant
• 1768640

• References
• Source

• Patent Number

  1,768,640

• Date Filed

  Not available

• Date Issued

  Tuesday, July 1, 1930
  94 years ago

• CPC

  • B61L29/26 - mechanically operated

• US Classifications

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