2324581

Information

• Patent Grant
• 2324581

• References
• Source

• Patent Number

  2,324,581

• Date Filed

  Not available

• Date Issued

  Tuesday, July 20, 1943
  81 years ago

• CPC

  • G01J1/124 - based on the comparison of the intensity of measured light with a comparison source or comparison illuminated surface

• US Classifications

  • 356 - Optics: measuring and testing