ALEXANDRIA, Va., Sept. 8 -- United States Patent no. D1,146,596, issued on Sept. 8, was assigned to NINGBO LIYANG NEW MATERIAL COMPANY Ltd. (Ningbo, China).

"Upper track for curtain" was invented by Baoguo Tan (Ningbo, China) and Chun Jiang (Ningbo, China).

The patent was filed on April 6, 2023, under Application No. D/888,892.

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