3635135

Information

• Patent Grant
• 3635135

• References
• Source

• Patent Number

  3,635,135

• Date Filed

  Not available

• Date Issued

  Tuesday, January 18, 1972
  53 years ago

• CPC

  • G01J1/4219 - specially adapted for enlargers
  • G01J1/04 - Optical or mechnical part supplementary adjustable parts
  • G01J1/0455 - having a throughhole enabling the optical element to fulfil an additional optical function
  • G03B27/72 - Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
  • G01J1/0488 - with spectral filtering

• US Classifications

  • 396 - Photography
  • 356 - Optics: measuring and testing
  • 362 - Illumination
  • 385 - Optical waveguides