1955768

Information

• Patent Grant
• 1955768

• References
• Source

• Patent Number

  1,955,768

• Date Filed

  Not available

• Date Issued

  Tuesday, April 24, 1934
  90 years ago

• CPC

  • E21B10/44 - Bits with helical conveying portion
  • Y10T408/8923 - Removable central lead
  • Y10T408/9042 - and radially spaced cutting edge

• US Classifications

  • 175 - Boring or penetrating the earth
  • 408 - Cutting by use of rotating axially moving tool