3447327

Information

• Patent Grant
• 3447327

• References
• Source

• Patent Number

  3,447,327

• Date Filed

  Not available

• Date Issued

  Tuesday, June 3, 1969
  55 years ago

• CPC

  • E21D23/0052 - with advancing shifting devices connected therewith
  • E21D23/0409 - Aligning or guiding means for the supports or for the constitutive parts of the supports

• US Classifications

  • 405 - Hydraulic and earth engineering