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Patent applications and USPTO patent grants for Cheng; Zhaoshan.The latest application filed is for "water purifier and water preparation method thereof".
Patent | Date |
---|---|
Water filtration system with recirculation to reduce total dissolved solids creep effect Grant 11,072,551 - Zhang , et al. July 27, 2 | 2021-07-27 |
Water purifier and water preparation method thereof Grant 10,835,871 - Shuai , et al. November 17, 2 | 2020-11-17 |
Water Purifier And Water Preparation Method Thereof App 20190168164 - SHUAI; Shi ;   et al. | 2019-06-06 |
Water Filtration System With Recirculation To Reduce Total Dissolved Solids Creep Effect App 20180162761 - Zhang; Hai-Feng ;   et al. | 2018-06-14 |
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