3883225

Information

• Patent Grant
• 3883225

• References
• Source

• Patent Number

  3,883,225

• Date Filed

  Not available

• Date Issued

  Tuesday, May 13, 1975
  49 years ago

• CPC

  • A61B3/04 - Trial frames Sets of lenses for use therewith
  • A61H5/00 - Exercisers for the eyes
  • A61F2009/0043 - by supporting the instrument on the patient's head

• US Classifications

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