1480733

Information

• Patent Grant
• 1480733

• References
• Source

• Patent Number

  1,480,733

• Date Filed

  Not available

• Date Issued

  Tuesday, January 15, 1924
  101 years ago

• CPC

  • E21F13/06 - Transport of mined material at or adjacent to the working face
  • E21D17/0206 - Hydraulically operated extension devices
  • E21D19/00 - Provisional protective covers for working space
  • E21D23/0052 - with advancing shifting devices connected therewith

• US Classifications

  • 299 - Mining or in situ disintegration of hard material