1297740

Information

• Patent Grant
• 1297740

• References
• Source

• Patent Number

  1,297,740

• Date Filed

  Not available

• Date Issued

  Tuesday, March 18, 1919
  106 years ago

• CPC

  • B23B51/0072 - Drills for making non-circular holes
  • Y10T408/35 - including plural rotating tools

• US Classifications

  • 408 - Cutting by use of rotating axially moving tool