239479

Information

• Patent Grant
• 239479

• References
• Source

• Patent Number

  239,479

• Date Filed

  Not available

• Date Issued

  Tuesday, March 29, 1881
  143 years ago

• CPC

  • E21B19/083 - Cam, rack or like feed mechanisms
  • Y10T74/1616 - Cyclical displacement responsive to the alternating-motion

• US Classifications

  • 074 - Machine element or mechanism
  • 173 - Tool driving or impacting
  • 175 - Boring or penetrating the earth