3101933

Information

• Patent Grant
• 3101933

• References
• Source

• Patent Number

  3,101,933

• Date Filed

  Not available

• Date Issued

  Tuesday, August 27, 1963
  61 years ago

• CPC

  • E21C35/19 - Means for fixing picks or holders
  • E21C35/1936 - the picks having a square- or rectangular-section shank
  • E21C2035/1826 - characterised by adaptations to use an extraction tool

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 175 - Boring or penetrating the earth