3218812

Information

• Patent Grant
• 3218812

• References
• Source

• Patent Number

  3,218,812

• Date Filed

  Not available

• Date Issued

  Tuesday, November 23, 1965
  59 years ago

• CPC

  • E21D23/003 - consisting of a rigid pile
  • E21D23/0069 - without essential advancing shifting devices

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 248 - Supports