ALEXANDRIA, Va., Sept. 23 -- United States Patent no. D1,094,082, issued on Sept. 23, was assigned to NINGBO SUNFREE MOTOR TECHNOLOGY COMPANY Ltd. (Ningbo, China).
"Curtain track" was invented by Chun Jiang (Ningbo, China) and Jianhong Wei (Ningbo, China).
The patent was filed on Aug. 18, 2023, under Application No. D/900,220.
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