1891062

Information

• Patent Grant
• 1891062

• References
• Source

• Patent Number

  1,891,062

• Date Filed

  Not available

• Date Issued

  Tuesday, December 13, 1932
  91 years ago

• CPC

  • E21B4/12 - Electrically operated hammers

• US Classifications

  • 175 - Boring or penetrating the earth
  • 173 - Tool driving or impacting
  • 310 - Electrical generator or motor structure
  • 318 - Electricity: motive power systems