DIFF Subgroup
F21V 13/02 Combinations of only two kinds of elements
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups > Combinations of only two kinds of elements
CPC:
Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00 (controlling the distribution of the light emitted by adjustment of elements F21V14/00) > Combinations of only two kinds of elements
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
Child Classifications
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- F21V 13/08 the elements being filters or photoluminescent elements and reflectors IPC+CPC Available in IPC and CPC