3348381

Information

• Patent Grant
• 3348381

• References
• Source

• Patent Number

  3,348,381

• Date Filed

  Not available

• Date Issued

  Tuesday, October 24, 1967
  57 years ago

• CPC

  • E21D23/0065 - driven, or automatically

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 091 - Motors: expansible chamber type