ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,845, issued on March 18, was assigned to KONINKLIJKE PHILIPS N.V. (Eindhoven, Netherlands).
"Hair-cutting unit for a shaving device" was invented by Ingmar Grasmeijer (Leeuwarden, Netherlands), Margarita Zwanette Van Raalte (Tuk, Netherlands) and Hemmo Nieman (Drachten, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hair-cutting unit with rotatable cutting elements for use in a shaving device has hair entry slits of which at least a side surface facing in a direction generally opposite to a direction of rotation of the cutting elements, has a relatively flat and oblique intermediate segment between an upper segment forming a curved tr...