3147489

Information

• Patent Grant
• 3147489

• References
• Source

• Patent Number

  3,147,489

• Date Filed

  Not available

• Date Issued

  Tuesday, September 8, 1964
  60 years ago

• CPC

  • A61F9/028 - Ventilation means
  • A61F9/022 - Use of special optical filters
  • A61F9/065 - use of particular optical filters
  • A61F2009/021 - Goggles with prescription spectacle lenses

• US Classifications

  • 002 - Apparel
  • 351 - Optics: eye examining, vision testing and correcting