472072

Information

• Patent Grant
• 472072

• References
• Source

• Patent Number

  472,072

• Date Filed

  Not available

• Date Issued

  Tuesday, April 5, 1892
  132 years ago

• CPC

  • E01B27/18 - by introducing additional fresh material under the sleepers

• US Classifications

  • 104 - Railways
  • 264 - Plastic and nonmetallic article shaping or treating: processes