2015978

Information

• Patent Grant
• 2015978

• References
• Source

• Patent Number

  2,015,978

• Date Filed

  Not available

• Date Issued

  Tuesday, October 1, 1935
  89 years ago

• CPC

  • E21B1/02 - Surface drives for percussion drilling
  • Y10S411/956 - Automatic base clutch
  • Y10S411/997 - Longitudinal fastener
  • Y10T74/2179 - Adjustable

• US Classifications

  • 074 - Machine element or mechanism
  • 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener