Lo, C. L. S. (Inventor), Yung, K. F. (Inventor), Tse, P. K. (Inventor), Wong, W. T. (Inventor) & Cheng, K. W. E. (Inventor), 22 Mar 2022, Patent No. ZL 202090000246.8, 20 Jan 2020, Priority date 23 Jan 2019, Priority No. 62/796,063
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