ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,751,688, issued on Oct. 6, was assigned to The Regents of the University of California (Oakland, Calif.).

"Ultrasound visualization device" was invented by Paul Zupkas (San Diego) and Roger Sur (San Diego).

According to the abstract* released by the U.S. Patent & Trademark Office: "An assembly for facilitating ultrasonic visualization of positioning of a needle inserted into tissue includes a needle that is inserted into a sheath to define a transport channel between an outer surface of the needle and an inner surface of the sheath for transport of a fluid that is introduced into the sheath. The transport channel includes features that induce formation of ultrasonically visible featur...