645552

Information

• Patent Grant
• 645552

• References
• Source

• Patent Number

  645,552

• Date Filed

  Not available

• Date Issued

  Tuesday, March 20, 1900
  124 years ago

• CPC

  • E01B3/12 - Longitudinal sleepers Longitudinal sleepers integral or combined with tie-rods Combined longitudinal and transverse sleepers
  • A63G7/00 - Up-and-down hill tracks Switchbacks

• US Classifications

  • 238 - Railways: surface track
  • 138 - Pipes and tubular conduits
  • 174 - Electricity: conductors and insulators