ALEXANDRIA, Va., Dec. 9 -- United States Patent no. D1,104,537, issued on Dec. 9, was assigned to NINGBO SUNFREE MOTOR TECHNOLOGY COMPANY Ltd. (Ningbo, China).
"Curtain driver" was invented by Chun Jiang (Ningbo, China) and Jianhong Wei (Ningbo, China).
The patent was filed on June 17, 2022, under Application No. D/864,760.
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