DIFF Subgroup Additional Only
Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Full Title
Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps > Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]