2109081

Information

• Patent Grant
• 2109081

• References
• Source

• Patent Number

  2,109,081

• Date Filed

  Not available

• Date Issued

  Tuesday, February 22, 1938
  86 years ago

• CPC

  • E21C25/30 - Chain guides
  • E21C35/1936 - the picks having a square- or rectangular-section shank

• US Classifications

  • 299 - Mining or in situ disintegration of hard material