ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,453,409, issued on Oct. 28, was assigned to Proxihealthcare Inc. (Ulsan, South Korea).
"Electric toothbrush" was invented by Young Wook Kim (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to an electric toothbrush that includes an outer case including a handle part having a tubular shape, and a head part extending from the handle part and having an opening area open to front; first and second electrodes disposed in the opening area and providing electromagnetic waves corresponding to a driving signal; and a head cover having a plurality of bristle holes, a first electrode hole, and a second electrode hole...