1617941

Information

• Patent Grant
• 1617941

• References
• Source

• Patent Number

  1,617,941

• Date Filed

  Not available

• Date Issued

  Tuesday, February 15, 1927
  98 years ago

• CPC

  • E21C27/46 - by percussed planing means

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 212 - Traversing hoists
  • 414 - Material or article handling