ALEXANDRIA, Va., June 4 -- United States Patent no. D1,077,880, issued on June 3, was assigned to Shenzhen Raypole Technology Co. Ltd. (Shenzhen, China).
"Counter current swim machine" was invented by Lijuan Zhang (Shenzhen, China).
The patent was filed on April 9, 2025, under Application No. D/997,834.
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