1981788

Information

• Patent Grant
• 1981788

• References
• Source

• Patent Number

  1,981,788

• Date Filed

  Not available

• Date Issued

  Tuesday, November 20, 1934
  90 years ago

• CPC

  • E02B5/02 - Making or lining canals
  • E01C19/25 - propelled by animals or vehicles

• US Classifications

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