3389671

Information

• Patent Grant
• 3389671

• References
• Source

• Patent Number

  3,389,671

• Date Filed

  Not available

• Date Issued

  Tuesday, June 25, 1968
  56 years ago

• CPC

  • E02F3/9243 - Passive suction heads with no mechanical cutting means
  • E02F3/8858 - Submerged units
  • E02F3/92 - Digging elements
  • E02F3/9275 - with axis of rotation parallel to longitudinal axis of the suction pipe
  • E02F9/062 - Advancing equipment
  • E02F9/26 - Indicating devices
  • E21B7/128 - from floating support with independent underwater anchored guide base
  • E21B25/18 - the core receiver being specially adapted for operation under water

• US Classifications

  • 114 - Ships