ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,427,244, issued on Sept. 30, was assigned to MEDTRUM TECHNOLOGIES INC. (Shanghai).

"Unilateral-driven patch-type drug infusion device" was invented by Cuijun Yang (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A unilateral-driven patch-type drug infusion device, includes: an infusion unit, which includes a drug storage unit; a screw connected to a piston and a driving wheel provided with wheel teeth, respectively, the driving wheel drives the screw to move by rotation, pushing the piston forward; at least one driving unit cooperating with the driving wheel, the driving unit includes at least one driving portion; a power unit and a reset unit ...