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DONGGUAN YICHENG LIGHTING TECH CO., Ltd.
2 patents in portfolio
US11796167
utility
2023
Glass Stem for Highly Waterproof Led Filament Lamp and Lamp Bulb
0 cites
US11543085
utility
2023
Glass Stem for Highly Waterproof LED Filament Lamp and Lamp Bulb
0 cites