2686391

Information

• Patent Grant
• 2686391

• References
• Source

• Patent Number

  2,686,391

• Date Filed

  Not available

• Date Issued

  Tuesday, August 17, 1954
  71 years ago

• CPC

  • B24B13/023 - for grinding several lenses simultaneously
  • B24B11/00 - Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work Accessories therefor

• US Classifications

  • 451 - Abrading