3478522

Information

• Patent Grant
• 3478522

• References
• Source

• Patent Number

  3,478,522

• Date Filed

  Not available

• Date Issued

  Tuesday, November 18, 1969
  56 years ago

• CPC

  • E21D23/16 - Hydraulic or pneumatic features
  • E21D23/0069 - without essential advancing shifting devices

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 091 - Motors: expansible chamber type