2889878

Information

• Patent Grant
• 2889878

• References
• Source

• Patent Number

  2,889,878

• Date Filed

  Not available

• Date Issued

  Tuesday, June 9, 1959
  65 years ago

• CPC

  • E21C49/02 - by excavating
  • Y10S83/953 - with work support
  • Y10T83/2174 - Blockable exit port
  • Y10T83/2216 - Inclined conduit, chute or plane
  • Y10T83/6588 - Tools mounted on common tool support
  • Y10T83/8848 - Connecting rod articulated with tool support

• US Classifications

  • 083 - Cutting
  • 172 - Earth working