1951180

Information

• Patent Grant
• 1951180

• References
• Source

• Patent Number

  1,951,180

• Date Filed

  Not available

• Date Issued

  Tuesday, March 13, 1934
  91 years ago

• CPC

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

• US Classifications

  • 356 - Optics: measuring and testing
  • 396 - Photography