ALEXANDRIA, Va., May 5 -- United States Patent no. D1,125,578, issued on May 5, was assigned to Masterspas LLC (Fort Wayne, Ind.).
"Cold plunge spa" was invented by Nathan Coelho (Leo, Ind.), Melanie Harris (Fort Wayne, Ind.) and Nathaniel Kipfer (Fort Wayne, Ind.).
The patent was filed on Oct. 25, 2023, under Application No. D/905,757.
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