CPC Subgroup
G01N 21/84 Systems specially adapted for particular applications
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
14 direct subcodes
Child Classifications
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- G01N 21/85 Investigating moving fluids or granular solids
- G01N 21/86 Investigating moving sheets (G01N21/89 takes precedence)
- G01N 21/87 Investigating jewels (G01N21/88 takes precedence)
- G01N 21/88 Investigating the presence of flaws or contamination