3321032

Information

• Patent Grant
• 3321032

• References
• Source

• Patent Number

  3,321,032

• Date Filed

  Not available

• Date Issued

  Tuesday, May 23, 1967
  57 years ago

• CPC

  • B28D1/14 - by boring or drilling
  • E21C47/10 - for quarrying stone, sand, gravel, or clay

• US Classifications

  • 173 - Tool driving or impacting
  • 125 - Stone working
  • 299 - Mining or in situ disintegration of hard material