ALEXANDRIA, Va., Dec. 16 -- United States Patent no. D1,106,486, issued on Dec. 16.
"Dropping tube" was invented by Lizhong Dai (Hunan, China), Xujun Mi (Hunan, China), Xun Zhong (Hunan, China), Diansu Zheng (Hunan, China), Yaping Xie (Hunan, China) and Tao Zhu (Hunan, China).
The patent was filed on Dec. 14, 2023, under Application No. D/523,311.
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