ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,481,378, issued on Nov. 25, was assigned to Wacom Co. Ltd. (Saitama, Japan).
"System and sensor controller for use with active pen" was invented by Masayuki Miyamoto (Saitama, Japan), Takeshi Koike (Saitama, Japan) and Naoki Watanabe (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An active pen includes an integrated circuit that transmits a downlink signal through a first electrode and receives an uplink signal through a second electrode different from the first electrode. The active pen includes a stop filter inserted between the second electrode and the integrated circuit. The integrated circuit, in operation, performs transmission of ...