3803980

Information

• Patent Grant
• 3803980

• References
• Source

• Patent Number

  3,803,980

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1974
  50 years ago

• CPC

  • B23B51/0072 - Drills for making non-circular holes
  • Y10T409/304424 - Means for internal milling

• US Classifications

  • 409 - Gear cutting, milling, or planing
  • 144 - Woodworking