3225547

Information

• Patent Grant
• 3225547

• References
• Source

• Patent Number

  3,225,547

• Date Filed

  Not available

• Date Issued

  Tuesday, December 28, 1965
  59 years ago

• CPC

  • E21D23/0073 - with advancing shifting devices connected therewith
  • E21D23/081 - forming parts of the roof supports

• US Classifications

  • 405 - Hydraulic and earth engineering