3416866

Information

• Patent Grant
• 3416866

• References
• Source

• Patent Number

  3,416,866

• Date Filed

  Not available

• Date Issued

  Tuesday, December 17, 1968
  56 years ago

• CPC

  • G01J1/12 - using wholly visual means
  • 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
  • 359 - Optical: systems and elements