1690263

Information

• Patent Grant
• 1690263

• References
• Source

• Patent Number

  1,690,263

• Date Filed

  Not available

• Date Issued

  Tuesday, November 6, 1928
  96 years ago

• CPC

  • E01C23/082 - using non-powered tools
  • E01C23/0825 - rotary
  • Y10T403/7141 - Plural channels in connector

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 172 - Earth working
  • 403 - Joints and connections