ALEXANDRIA, Va., June 19 -- United States Patent no. 12,329,942, issued on June 17, was assigned to BEIJING QS MEDICAL TECHNOLOGY Co. LTD. (Beijing).

"Injection head of needleless syringe, needleless syringe body and needleless syringe" was invented by Ming Zhang (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to an injection head of a needleless syringe, needleless syringe body, and needleless syringe. The injection head includes a medicine barrel and a piston rod. The medicine barrel opens at a rear end and has an injection micropore at a front end. A piston of a piston rod is movable within a chamber in an front-rear direction, the piston and a sidewall and a front w...