ALEXANDRIA, Va., June 10 -- United States Patent no. 12,290,419, issued on May 6, was assigned to TRISA HOLDING AG (Triengen, Switzerland).

"Attachment brush device" was invented by Stefan Scherzinger (Willisau, Switzerland) and Fabian Keller (Sursee, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A plug-on brush device for a toothbrush handpiece, in particular for an electrical toothbrush handpiece, with an application unit including a head section with a brush head, a plug-on section and a neck section that is arranged between the head section and the plug-on section, and with an interface accommodation unit which is configured to receive at least one interface of a toothbrush handpiece, wherei...