ALEXANDRIA, Va., April 2 -- United States Patent no. D1,068,428, issued on April 1, was assigned to Nanhe County Ruixin Steel File Co. Ltd. (Xingtai, China).
"Mechanical rasp" was invented by Minwei Fan (Xingtai, China) and Minke Fan (Xingtai, China).
The patent was filed on April 12, 2023, under Application No. D/889,459.
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