G01N 2021/155 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup Additional Only

G01N 2021/155

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) > Arrangements or apparatus for facilitating the optical investigation > Preventing contamination of the components of the optical system or obstruction of the light path

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.

This code exists only in CPC.

Diff view requires codes present in both systems.

View in CPC →