3681927

Information

• Patent Grant
• 3681927

• References
• Source

• Patent Number

  3,681,927

• Date Filed

  Not available

• Date Issued

  Tuesday, August 8, 1972
  53 years ago

• CPC

  • E02F5/104 - for burying conduits or cables in trenches under water
  • E02F5/106 - using ploughs, coulters, rippers
  • F16L1/168 - under ice

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 030 - Cutlery
  • 299 - Mining or in situ disintegration of hard material