ALEXANDRIA, Va., Nov. 18 -- United States Patent no. D1,102,496, issued on Nov. 18, was assigned to SEOUL FASTENING Co. LTD. (Seoul, South Korea).
"Stop drill bit for drilling concrete" was invented by Yun Ku Song (Seoul, South Korea).
The patent was filed on Jan. 3, 2024, under Application No. D/907,042.
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