ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,531,192, issued on Jan. 20, was assigned to Logitech Europe S.A. (Lausanne, Switzerland).
"Keyboard key structure and light guide" was invented by Yung-Lin Chen (Hsinchu, Taiwan), Kuo Hsiang Chen (Toufen, Taiwan) and Feng-Hao Lin (Hsinchu, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In some embodiments, a keyboard key structure includes: a substrate; a key switch, which includes a top housing, a bottom housing. and a key stem. The top housing covers the key stem and is coupled to the bottom housing to form a cavity. The bottom housing is coupled to the substrate. The keyboard key structure further include a keycap including a light transmissiv...