1509173

Information

• Patent Grant
• 1509173

• References
• Source

• Patent Number

  1,509,173

• Date Filed

  Not available

• Date Issued

  Tuesday, September 23, 1924
  100 years ago

• CPC

  • E21C47/10 - for quarrying stone, sand, gravel, or clay

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 037 - Excavating