2269723

Information

• Patent Grant
• 2269723

• References
• Source

• Patent Number

  2,269,723

• Date Filed

  Not available

• Date Issued

  Tuesday, January 13, 1942
  83 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