3145506

Information

• Patent Grant
• 3145506

• References
• Source

• Patent Number

  3,145,506

• Date Filed

  Not available

• Date Issued

  Tuesday, August 25, 1964
  60 years ago

• CPC

  • B24B9/142 - for contact lenses

• US Classifications

  • 451 - Abrading
  • 351 - Optics: eye examining, vision testing and correcting