2434890

Information

• Patent Grant
• 2434890

• References
• Source

• Patent Number

  2,434,890

• Date Filed

  Not available

• Date Issued

  Tuesday, January 20, 1948
  77 years ago

• CPC

  • G01J1/60 - by measuring the pupil of the eye

• US Classifications

  • 356 - Optics: measuring and testing
  • 351 - Optics: eye examining, vision testing and correcting