ALEXANDRIA, Va., July 16 -- United States Patent no. D1,132,426, issued on June 30, was assigned to Klafs GmbH (Schwabisch Hall, Germany).
"Sauna heater" was invented by Martin Schultheiss (Schwaebisch Gmuend, Germany) and Heinrich Henssler (Schwaebisch Gmuend, Germany).
The patent was filed on Dec. 14, 2023, under Application No. D/920,997.
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