ALEXANDRIA, Va., June 2 -- United States Patent no. 12,642,503, issued on June 2, was assigned to National Taiwan University of Science and Technology (Taipei City, Taiwan), NATIONAL TAIWAN UNIVERSITY (Taipei, Taiwan) and National Defense Medical University (Taipei, Taiwan).

"Needle free delivery system and operation method thereof" was invented by Ai-Ho Liao (Taipei City, Taiwan), Chih-Hung Wang (New Taipei City, Taiwan) and Hao-Li Liu (Taipei City, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a needle free delivery system, which includes a handheld device and a signal switching device. The signal switching device is electrically connected to the handheld device, and...