1931560

Information

• Patent Grant
• 1931560

• References
• Source

• Patent Number

  1,931,560

• Date Filed

  Not available

• Date Issued

  Tuesday, October 24, 1933
  91 years ago

• CPC

  • E21C25/30 - Chain guides

• US Classifications

  • 299 - Mining or in situ disintegration of hard material