2981831

Information

• Patent Grant
• 2981831

• References
• Source

• Patent Number

  2,981,831

• Date Filed

  Not available

• Date Issued

  Tuesday, April 25, 1961
  63 years ago

• CPC

  • B61L3/04 - controlling mechanically

• US Classifications

  • 246 - Railway switches and signals
  • 324 - Electricity: measuring and testing