1482990

Information

• Patent Grant
• 1482990

• References
• Source

• Patent Number

  1,482,990

• Date Filed

  Not available

• Date Issued

  Tuesday, February 5, 1924
  100 years ago

• CPC

  • E21C25/66 - Machines for making slits with additional arrangements for drilling
  • Y10T74/17 - Rotary driven device adjustable during operation relative to its supporting structure

• US Classifications

  • 074 - Machine element or mechanism
  • 173 - Tool driving or impacting
  • 175 - Boring or penetrating the earth
  • 299 - Mining or in situ disintegration of hard material