ALEXANDRIA, Va., June 18 -- United States Patent no. D1,078,638, issued on June 10, was assigned to Weifang Xingyuan Trading Co. Ltd. (Weifang, China).
"Variable frequency control device" was invented by Yangyang Chen (Shuangyashan, China).
The patent was filed on Jan. 7, 2025, under Application No. D/982,741.
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