ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,402,214, issued on Aug. 26, was assigned to TURK & HILLINGER GMBH (Tuttlingen, Germany).
"Electric heater" was invented by Andreas Schlipf (Tuttlingen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electrical heating device with a tubular metal jacket and with at least one electrical heating element, which is arranged electrically isolated from the tubular metal jacket in an interior of the tubular metal jacket. The electrical heating element runs parallel to a tube center axis of the tubular metal jacket and has a wave-like shape such that wave peaks and wave valleys are produced."
The patent was filed on March 2, 2021, under Application N...