ALEXANDRIA, Va., March 19 -- United States Patent no. D1,067,073, issued on March 18, was assigned to GuiLin Huayi Peakmeter Co. Ltd. (GuiLin, China).
"Test pencil" was invented by Lin Li (GuiLin, China), Chao Gao (GuiLin, China), Zuzheng Dai (GuiLin, China), Qian Liao (GuiLin, China) and Shicheng Xu (GuiLin, China).
The patent was filed on May 19, 2023, under Application No. D/892,626.
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