1642182

Information

• Patent Grant
• 1642182

• References
• Source

• Patent Number

  1,642,182

• Date Filed

  Not available

• Date Issued

  Tuesday, September 13, 1927
  97 years ago

• CPC

  • E21F17/00 - Methods or devices for use in mines or tunnels, not covered elsewhere
  • E21C29/20 - with safety devices operating in the event of breakage of the cable or chain

• US Classifications

  • 299 - Mining or in situ disintegration of hard material