DIFF Subgroup
G01J 3/513 Full Title
Spectrometry; Spectrophotometry; Monochromators; Measuring colours > Measurement of colour; Colour measuring devices, e.g. colorimeters (measuring colour temperature G01J5/60) > using electric radiation detectors > using colour filters
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Note: 1 CPC extensions are marked as secondary classification only.