ALEXANDRIA, Va., June 17 -- United States Patent no. D1,076,431, issued on May 27, was assigned to XIAMEN CONCRETE WOW IMPORT AND EXPORT TRADE Co. LTD (Xiamen, China).
"Trowel box" was invented by Chiahung Chen (Kinmen County, Taiwan).
The patent was filed on Aug. 23, 2023, under Application No. D/900,604.
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