using sheets without apertures, e.g. fixed

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Screens not covered by groups , , or > using sheets without apertures, e.g. fixed

CPC:

Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 (characterised by cooling arrangements F21V29/502) > using sheets without apertures, e.g. fixed

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

Child Classifications

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F21V 11/18 movable, e.g. flaps, slides +2 CPC IPC+CPC Available in IPC and CPC