1657489

Information

• Patent Grant
• 1657489

• References
• Source

• Patent Number

  1,657,489

• Date Filed

  Not available

• Date Issued

  Tuesday, January 31, 1928
  96 years ago

• CPC

  • B61L29/26 - mechanically operated
  • Y10S200/09 - Momentum

• US Classifications

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