3677620

Information

• Patent Grant
• 3677620

• References
• Source

• Patent Number

  3,677,620

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1972
  52 years ago

• CPC

  • G02C7/14 - Mirrors Prisms
  • G02C5/005 - Glasses allowing access to one eye

• US Classifications

  • 359 - Optical: systems and elements
  • 351 - Optics: eye examining, vision testing and correcting