2581823

Information

• Patent Grant
• 2581823

• References
• Source

• Patent Number

  2,581,823

• Date Filed

  Not available

• Date Issued

  Tuesday, January 8, 1952
  73 years ago

• CPC

  • B23B39/04 - Co-ordinate boring or drilling machines Machines for making holes without previous marking

• US Classifications

  • 033 - Geometrical instruments
  • 356 - Optics: measuring and testing