ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,856, issued on April 21, was assigned to KONINKLIJKE PHILIPS N.V. (Eindhoven, Netherlands).
"Tactile wear indicator for a cutting element" was invented by Peter Daniel Martijn Van Zoest (Zuidhorn, Netherlands), Dirk Hendrik Wevers (Drachten, Netherlands) and Arno Kroezen (Drachten, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cutting element (106) for a hair cutting device (100) has a tactile wear indicator (140) that defines a skin-contact surface of the cutting element (106). The tactile wear indicator (140) has a wearable outer layer (148) of coating material having a dry lubricant additive (150), which reduces friction between t...