F21Y 2107/10
Light sources with three-dimensionally disposed light-generating elements on concave supports or substrates, e.g. on the inner side of bowl-shaped supports
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Edits on 5 Mar, 2022
Golden AI
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F21Y 2107/10
Light sources with three-dimensionally disposed light-generating elements on concave supports or substrates, e.g. on the inner side of bowl-shaped supports
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