1620913

Information

• Patent Grant
• 1620913

• References
• Source

• Patent Number

  1,620,913

• Date Filed

  Not available

• Date Issued

  Tuesday, March 15, 1927
  97 years ago

• CPC

  • E21D15/34 - by axially- moving balls, rollers, or the like
  • E21B19/10 - Slips Spiders; Catching devices
  • Y10S137/904 - Cushion check valves

• US Classifications

  • 188 - Brakes
  • 137 - Fluid handling
  • 248 - Supports