3809432

Information

• Patent Grant
• 3809432

• References
• Source

• Patent Number

  3,809,432

• Date Filed

  Not available

• Date Issued

  Tuesday, May 7, 1974
  50 years ago

• CPC

  • E21C31/10 - for slewing parts of the machines
  • E21D9/1086 - Drives or transmissions specially adapted therefor

• US Classifications

  • 299 - Mining or in situ disintegration of hard material