1892994

Information

• Patent Grant
• 1892994

• References
• Source

• Patent Number

  1,892,994

• Date Filed

  Not available

• Date Issued

  Tuesday, January 3, 1933
  92 years ago

• CPC

  • E21C37/22 - Hand tools or hand-held power-operated tools specially adapted for dislodging minerals

• US Classifications

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