ALEXANDRIA, Va., June 16 -- United States Patent no. 12,303,081, issued on May 20, was assigned to HOBOT TECHNOLOGY INC. (Hsinchu County, Taiwan).
"Self-propelled device" was invented by Chi Mou Chao (Hsinchu County, Taiwan) and Hsin-Hui Wu (Hsinchu County, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments of the present invention relate to a self-propelled device. The self-propelled device includes: a body defining a first space and a second space in communication with the first space, wherein the volume of the second space is less than the volume of the first space and the second space is closer to an edge of the body than the first space; a moving module adjacent to the body; an air extrac...