ALEXANDRIA, Va., April 7 -- United States Patent no. D1,121,842, issued on April 7, was assigned to DuPont Safety & Construction Inc. (Wilmington, Del.).
"Synthetic building slab" was invented by Hyun Sung Kwon (Buffalo, N.Y.).
The patent was filed on Aug. 11, 2023, under Application No. D/899,749.
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