ALEXANDRIA, Va., Aug. 5 -- United States Patent no. D1,139,817, issued on Aug. 4, was assigned to SHENZHEN JOYROOM TECHNOLOGY Co. LTD (Shenzhen, China).
"Filter cartridge" was invented by Pingjun Sun (Shenzhen, China).
The patent was filed on Oct. 20, 2025, under Application No. D/028,836.
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