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Patent applications and USPTO patent grants for Li; Wanzhen.The latest application filed is for "filament bulb with uniform luminance".
Patent | Date |
---|---|
Mining lamp Grant D882,854 - Yang , et al. | 2020-04-28 |
Filament bulb with uniform luminance Grant 10,473,291 - Cao , et al. Nov | 2019-11-12 |
Lighting device Grant 10,344,920 - Cao , et al. July 9, 2 | 2019-07-09 |
Method for installing LED light bar into light bulb and device Grant 10,247,364 - Cao , et al. | 2019-04-02 |
Filament Bulb With Uniform Luminance App 20180306407 - Cao; Liangliang ;   et al. | 2018-10-25 |
Lighting Device App 20180283620 - Cao; Liangliang ;   et al. | 2018-10-04 |
Method For Installing Led Light Bar Into Light Bulb And Device App 20180112833 - Cao; Liangliang ;   et al. | 2018-04-26 |
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