3820345

Information

• Patent Grant
• 3820345

• References
• Source

• Patent Number

  3,820,345

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  50 years ago

• CPC

  • E02D17/12 - Back-filling of foundation trenches or ditches
  • E02D17/086 - Travelling trench shores
  • E02F5/10 - with arrangements for reinforcing trenches or ditches with arrangements for making or assembling conduits or for laying conduits or cables
  • E02F5/12 - with equipment for back-filling trenches or ditches

• US Classifications

  • 405 - Hydraulic and earth engineering