3889481

Information

• Patent Grant
• 3889481

• References
• Source

• Patent Number

  3,889,481

• Date Filed

  Not available

• Date Issued

  Tuesday, June 17, 1975
  49 years ago

• CPC

  • E21D23/006 - provided with essential hydraulic devices

• US Classifications

  • 405 - Hydraulic and earth engineering