3601998

Information

• Patent Grant
• 3601998

• References
• Source

• Patent Number

  3,601,998

• Date Filed

  Not available

• Date Issued

  Tuesday, August 31, 1971
  53 years ago

• CPC

  • E21D23/0073 - with advancing shifting devices connected therewith

• US Classifications

  • 405 - Hydraulic and earth engineering