ALEXANDRIA, Va., June 12 -- United States Patent no. D1,074,974, issued on May 13, was assigned to DeQing AoZhong Fan Equipment Co. Ltd. (Zhaoqing, China).
"Roof fan" was invented by Zhuolun Cai (Guangdong, China).
The patent was filed on May 16, 2024, under Application No. D/942,658.
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