1814465

Information

• Patent Grant
• 1814465

• References
• Source

• Patent Number

  1,814,465

• Date Filed

  Not available

• Date Issued

  Tuesday, July 14, 1931
  93 years ago

• CPC

  • B61L1/025 - actuated by variation of resistance or by piezo-electricity

• US Classifications

  • 246 - Railway switches and signals
  • 338 - Electrical resistors