ALEXANDRIA, Va., March 31 -- United States Patent no. D1,121,130, issued on March 31, was assigned to GREENAIRTECH Co. LTD. (Hwaseong-si, South Korea).
"Duct connection joint" was invented by Sung-Keun Noh (Suwon-si, South Korea).
The patent was filed on Dec. 2, 2022, under Application No. D/861,772.
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