ALEXANDRIA, Va., Feb. 3 -- United States Patent no. D1,110,827, issued on Feb. 3, was assigned to Jiangsu Jueke CNC Tool Co. Ltd. (Danyang, China).
"Step twist drill" was invented by Liying Peng (Danyang, China).
The patent was filed on Oct. 31, 2024, under Application No. D/970,930.
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