ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,433,396, issued on Oct. 7, was assigned to The Procter & Gamble Co. (Cincinnati).
"Method for producing a toothbrush head" was invented by Jochen Ganninger (Eschborn, Germany), Holger Schulz (Frankfurt, Germany) and Daniela Baum (Schwalbach, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of making a cleaning element carrier for a toothbrush comprises: providing at least two pluralities of loose filaments of a predefined length and different from one another in at least one of filament material, filament diameter, filament cross-section, filament shape, presence or absence of additives, presence or absence of a coating, and any combinatio...