1886620

Information

• Patent Grant
• 1886620

• References
• Source

• Patent Number

  1,886,620

• Date Filed

  Not available

• Date Issued

  Tuesday, November 8, 1932
  92 years ago

• CPC

  • E21D11/03 - using timber- setting machines
  • E21F13/006 - Equipment transport systems

• US Classifications

  • 299 - Mining or in situ disintegration of hard material