1859202

Information

• Patent Grant
• 1859202

• References
• Source

• Patent Number

  1,859,202

• Date Filed

  Not available

• Date Issued

  Tuesday, May 17, 1932
  92 years ago

• CPC

  • E21B10/445 - percussion type
  • B23B31/005 - Cylindrical shanks of tools
  • B23B51/02 - Twist drills
  • B23B2231/0236 - Octagonal
  • B23B2251/18 - Configuration of the drill point

• US Classifications

  • 175 - Boring or penetrating the earth