2302073

Information

• Patent Grant
• 2302073

• References
• Source

• Patent Number

  2,302,073

• Date Filed

  Not available

• Date Issued

  Tuesday, November 17, 1942
  82 years ago

• CPC

  • E21C25/66 - Machines for making slits with additional arrangements for drilling

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 173 - Tool driving or impacting
  • 175 - Boring or penetrating the earth
  • 464 - Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts