DIFF Subgroup Additional Only
G01N 2021/95638 Full Title
Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light (G01N3/00 - G01N19/00 take precedence) > Systems specially adapted for particular applications > Investigating the presence of flaws or contamination > characterised by the material or shape of the object to be examined (G01N21/89 - G01N21/91, G01N21/94 take precedence) > Inspecting patterns on the surface of objects
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
Note: 3 CPC extensions are marked as secondary classification only.