ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,501,521, issued on Dec. 16, was assigned to DENSO Corp. (Kariya, Japan).

"Heater device" was invented by Yuuya Suzuki (Kariya, Japan), Yuusuke Tanaka (Kariya, Japan) and Takuya Igashira (Kariya, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A heater device includes a heat generating portion formed so as to be adjacent to one surface of an insulating substrate and configured to generate heat, and a heat equalizing portion arranged between adjacent heat generating portions and configured to diffuse the heat of the heat generating portion. The heat generating portion has a linear shape, and at least one of a distance between one of the adjacent heat...