3381480

Information

• Patent Grant
• 3381480

• References
• Source

• Patent Number

  3,381,480

• Date Filed

  Not available

• Date Issued

  Tuesday, May 7, 1968
  56 years ago

• CPC

  • E21D23/0052 - with advancing shifting devices connected therewith
  • E21D23/0047 - without essential shifting devices
  • E21D23/0418 - Positioning devices and stabilizing means for the props

• US Classifications

  • 405 - Hydraulic and earth engineering