US Patent Issued to Yangtze University on March 25 for "Two-stroke pumping method and oil production device" (Chinese Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,949, issued on March 25, was assigned to Yangtze University (Jingzhou, China).

"Two-stroke pumping method and oil production device" was invented by Xianzhong Yi (Jingzhou, China), Shifan Zhang (Jingzhou, China), Guangkun Xia (Jingzhou, China), Xinbo Zhao (Jingzhou, China), Jifang Wan (Jingzhou, China), Yuanhua Zhou (Jingzhou, China), Yanbin Wang (Jingzhou, China), Yangchuan Ke (Jingzhou, China), Binbin Diao (Jingzhou, China), Peng Jia (Jingzhou, China) and Jun Fang (Jingzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a two-stroke pumping method and oil production device, and relates to the technical field...