1791840

Information

• Patent Grant
• 1791840

• References
• Source

• Patent Number

  1,791,840

• Date Filed

  Not available

• Date Issued

  Tuesday, February 10, 1931
  93 years ago

• CPC

  • E01B1/008 - Drainage of track
  • E01B1/001 - Track with ballast
  • E01B2204/07 - Drainage

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 404 - Road structure, process, or apparatus