ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,524,087, issued on Jan. 13, was assigned to Wacom Co. Ltd. (Saitama, Japan).
"Pen state detection circuit, system, and method" was invented by Koichi Maeyama (Saitama, Japan) and Hideyuki Hara (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a pen state detection circuit, a pen state detection system, and a pen state detection method that can improve estimation accuracy for a pen state in an electronic pen including at least one electrode. A pen state detection circuit acquires, from a touch sensor, a first signal distribution indicating a change in capacitance associated with approach of a first electrode and uses a machine l...