3240022

Information

• Patent Grant
• 3240022

• References
• Source

• Patent Number

  3,240,022

• Date Filed

  Not available

• Date Issued

  Tuesday, March 15, 1966
  58 years ago

• CPC

  • E21D23/0047 - without essential shifting devices

• US Classifications

  • 405 - Hydraulic and earth engineering