ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,532,879, issued on Jan. 27.
"Portable mosquito repelling device" was invented by Zhu Danna (Kowloon, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application provides a portable mosquito repelling device including a repelling device body. A case placing slot is located inside the repelling device body; the repelling device body and the case placing slot are connected with each other through a ring-shaped plate; the ring-shaped plate defines a set of air outlet holes, which are evenly distributed. The mosquito repellent essential oil, which contains natural plant components, is used instead of substances having medicinal properties, w...