3804391

Information

• Patent Grant
• 3804391

• References
• Source

• Patent Number

  3,804,391

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1974
  51 years ago

• CPC

  • B23K7/107 - for cutting circles

• US Classifications

  • 266 - Metallurgical apparatus
  • 033 - Geometrical instruments