3496368

Information

• Patent Grant
• 3496368

• References
• Source

• Patent Number

  3,496,368

• Date Filed

  Not available

• Date Issued

  Tuesday, February 17, 1970
  54 years ago

• CPC

  • G01J1/4209 - Photoelectric exposure meters for determining the exposure time in recording or reproducing
  • G01J1/42 - using electric radiation detectors
  • G01J1/4223 - specially adapted for copy - or printing apparatus
  • G03B27/66 - specially adapted for holding half-tone screens
  • G03B27/72 - Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus

• US Classifications

  • 250 - Radiant energy
  • 356 - Optics: measuring and testing