2678540

Information

• Patent Grant
• 2678540

• References
• Source

• Patent Number

  2,678,540

• Date Filed

  Not available

• Date Issued

  Tuesday, May 18, 1954
  70 years ago

• CPC

  • E02D23/12 - inclined lowering
  • E02D23/14 - Decreasing the skin friction while lowering
  • E21D1/08 - while moving the lining downwards

• US Classifications

  • 405 - Hydraulic and earth engineering