1646417

Information

• Patent Grant
• 1646417

• References
• Source

• Patent Number

  1,646,417

• Date Filed

  Not available

• Date Issued

  Tuesday, October 25, 1927
  97 years ago

• CPC

  • E21D17/0206 - Hydraulically operated extension devices
  • E21D23/0069 - without essential advancing shifting devices

• US Classifications

  • 405 - Hydraulic and earth engineering