ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,493,365, issued on Dec. 9, was assigned to Wacom Co. Ltd. (Saitama, Japan).
"Waterproof electronic pen" was invented by Takayuki Arai (Saitama, Japan), Kenichi Ninomiya (Saitama, Japan) and Takenori Kaneda (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A highly reliable waterproof electronic pen includes a board holder in a board housing including a recessed portion having an opening over a lower surface of the recessed portion. A circuit board is housed in the recessed portion of the board housing. Circuit components easily affected by heat are installed on a first surface of the circuit board, and circuit components not easily affected ...