ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,848, issued on Nov. 18, was assigned to STAR SMART Ltd. (Hongkong, Hong Kong).
"Portable oil pump with charging function" was invented by Zhijie Chen (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A portable oil pump with a charging function includes a main unit, an oil pumping pipe, a pump body, and an oil outlet pipe. The oil pumping pipe is connected to the main unit. The oil outlet pipe is in communication with the oil pumping pipe. The pump body is arranged inside the oil pumping pipe. The main unit is equipped with a circuit board, a battery, and a power interface. The battery is a rechargeable battery. A charging unit, a mai...