from visible, ultraviolet, or infrared light (screening of lighting devices F21V; optical filters G02B5/20)

Introduced: September 1968

Title

Titles differ between systems:

IPC: from ultraviolet , visible, or infrared light

CPC: from visible, ultraviolet, or infrared light (screening of lighting devices F21V; optical filters G02B5/20)

Full Title

Full titles differ between systems:

IPC:

Screening > from ultraviolet , visible, or infrared light

CPC:

Screening (insulation or other protection of buildings E04B; emergency protection of apparatus in general F16P7/00; in connection with acoustic waves G10K11/00; in connection with nuclear radiation G21F) > from visible, ultraviolet, or infrared light (screening of lighting devices F21V; optical filters G02B5/20)

No child classifications to compare. This is a leaf node in both IPC and CPC.