3357230

Information

• Patent Grant
• 3357230

• References
• Source

• Patent Number

  3,357,230

• Date Filed

  Not available

• Date Issued

  Tuesday, December 12, 1967
  57 years ago

• CPC

  • G01J1/124 - based on the comparison of the intensity of measured light with a comparison source or comparison illuminated surface
  • G03B43/00 - Testing correct operation of photographic apparatus or parts thereof

• US Classifications

  • 356 - Optics: measuring and testing
  • 348 - Television