1818970

Information

• Patent Grant
• 1818970

• References
• Source

• Patent Number

  1,818,970

• Date Filed

  Not available

• Date Issued

  Tuesday, August 18, 1931
  93 years ago

• CPC

  • B61L1/04 - mechanically actuated by a part of the vehicle

• US Classifications

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