1857376

Information

• Patent Grant
• 1857376

• References
• Source

• Patent Number

  1,857,376

• Date Filed

  Not available

• Date Issued

  Tuesday, May 10, 1932
  92 years ago

• CPC

  • E21C25/30 - Chain guides

• US Classifications

  • 299 - Mining or in situ disintegration of hard material