ALEXANDRIA, Va., Aug. 12 -- United States Patent no. D1,088,234, issued on Aug. 12, was assigned to Shenzhen Dongjilian Medical Tech Co. Ltd (Shenzhen, China).
"Portable oxygen concentrator" was invented by Hong Zhang (Shenzhen, China).
The patent was filed on July 5, 2023, under Application No. D/879,234.
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