ALEXANDRIA, Va., June 18 -- United States Patent no. 12,326,302, issued on June 10, was assigned to ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT Co. LTD. (Shaoxing, China).

"Heat exchanger and air conditioner" was invented by Guanjun Wang (Shaoxing, China), Zhaozhong Lan (Shaoxing, China) and Ergang Ding (Shaoxing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A heat exchanger and an air conditioner are provided. The heat exchanger includes fins and flat pipes arranged in parallel. Each of the flat pipes includes a first finned region, a second finned region, and a finless region. The first finned region is the second finned region via the finless region. The fins are provided both between adjacent two first...