ALEXANDRIA, Va., June 12 -- United States Patent no. 12,298,014, issued on May 13, was assigned to Gree Electric Appliances Inc. of Zhuhai (Zhuhai, China).

"Heating device" was invented by Long Zhang (Guangdong, China), Bo Yu (Guangdong, China), Yuye Luo (Guangdong, China) and Jian Zhang (Guangdong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a heating device, including a housing, and an electrothermal film and a fan arranged in the housing, wherein the fan is located at a bottom of the electrothermal film, the fan is provided with an air inlet facing upwards and an air outlet facing forwards, and the housing is provided with a vent hole at a position corresponding to the air outlet." ...