Systems specially adapted for particular applications

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light > Systems specially adapted for particular applications

CPC:

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

CPC subdivides this area 4x more granularly than IPC with 10 additional codes.

10 codes are CPC-only extensions.

Note: 8 CPC extensions are marked as secondary classification only.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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G01N 2021/8405 2nd only CPC only CPC only
G01N 2021/8411 2nd only +1 CPC CPC only CPC only
G01N 2021/8444 2nd only CPC only CPC only
G01N 2021/845 2nd only +1 CPC CPC only CPC only
G01N 2021/8461 2nd only CPC only CPC only
G01N 2021/8466 2nd only CPC only CPC only
G01N 2021/8472 2nd only CPC only CPC only
G01N 2021/8477 2nd only CPC only CPC only
G01N 21/8422 +2 CPC CPC only CPC only
G01N 21/8483 +2 CPC CPC only CPC only
G01N 21/85 Investigating moving fluids or granular solids since 1980 +5 CPC IPC+CPC Available in IPC and CPC
G01N 21/86 Investigating moving sheets (G01N21/89 takes precedence) since 1980 +5 CPC IPC+CPC Available in IPC and CPC
G01N 21/87 Investigating jewels (G01N21/88 takes precedence) since 1980 IPC+CPC Available in IPC and CPC
G01N 21/88 Investigating the presence of flaws or contamination since 1980 +3 CPC IPC+CPC Available in IPC and CPC