ALEXANDRIA, Va., Dec. 31 -- United States Patent no. D1,107,687, issued on Dec. 30, was assigned to Unplugs Hearing Inc. (Brooklyn, N.Y.).
"Sound attenuator" was invented by Ralph T Campagna (Putnam, Conn.), Natan Bauman (Cheshire, Conn.) and Thomas Zachary Worcester (Brooklyn, N.Y.).
The patent was filed on Sept. 8, 2025, under Application No. D/021,954.
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