ALEXANDRIA, Va., March 24 -- United States Patent no. 12,585,361, issued on March 24, was assigned to Apple Inc. (Cupertino, Calif.).

"Touch input devices" was invented by Qiliang Xu (Alamo, Calif.), Ming Yu (Saratoga, Calif.), Xiaonan Wen (San Jose, Calif.), Ehsan Khajeh (Los Gatos, Calif.), Jason S. Griesbach (Sausalito, Calif.) and Brian M. King (Saratoga, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Input devices can employ ultrasonic touch sensing capabilities that allow user inputs to be detected through conductive materials, such as metal enclosures. The ultrasonic touch sensing can include generation of ultrasound signals with a piezoelectric layer. The ultrasound signals can be reflected wh...