1928139

Information

• Patent Grant
• 1928139

• References
• Source

• Patent Number

  1,928,139

• Date Filed

  Not available

• Date Issued

  Tuesday, September 26, 1933
  92 years ago

• CPC

  • E21F13/04 - Transport of mined material in gravity inclines in staple or inclined shafts
  • B66B17/26 - for loading or unloading mining-hoist skips
  • B65G2812/069 - for vertical shaft transport

• US Classifications

  • 414 - Material or article handling
  • 187 - Elevator, industrial lift truck, or stationary lift for vehicle