ALEXANDRIA, Va., Aug. 20 -- United States Patent no. D1,089,335, issued on Aug. 19, was assigned to ZHENGZHOU ANXIN ABRASIVES Co. LTD (Zhengzhou, China).
"Multi-layer grinding disc" was invented by Yi'an Fan (Zhengzhou, China), Zhengyang Feng (Zhengzhou, China), Hongying Jia (Zhengzhou, China) and Weifeng Shao (Zhengzhou, China).
The patent was filed on Feb. 10, 2025, under Application No. D/989,136.
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