ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,772, issued on May 20, was assigned to ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT Co. LTD. (Shaoxing, China).

"Reversible electromagnetic valve and air conditioning unit having same" was invented by Zhongbo Feng (Shaoxing, China), Yunjun Xiong (Shaoxing, China) and Zhou Yu (Shaoxing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A reversible electromagnetic valve and an air conditioning unit are provided. The reversible electromagnetic valve includes a valve body and a valve core assembly, the valve body is provided with a valve cavity, and the valve core assembly is arranged in the valve cavity. The valve core assembly includes a piston and a con...