ALEXANDRIA, Va., June 16 -- United States Patent no. D1,075,911, issued on May 20, was assigned to TONGLU ZHENGSHENG PEN Co. LTD. (Hangzhou, China).
"Pen" was invented by Xiaowang Wu (Hangzhou, China).
The patent was filed on May 5, 2023, under Application No. D/875,502.
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