ALEXANDRIA, Va., June 16 -- United States Patent no. 12,306,364, issued on May 20, was assigned to BrainSonix Corp. (Sherman Oaks, Calif.).

"Quality assurance devices and methods to ensure proper ultrasound exposure" was invented by Mark E. Schafer (Ambler, Pa.), Samantha F. Schafer (Ambler, Pa.) and James M. Gessert (Longmont, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Calibration or quality assurance devices and methods that ensure proper ultrasound exposure. An apparatus for calibrating an ultrasound transducer is provided. The apparatus includes a hydrophone assembly having a layer containing a solid material and a hydrophone element embedded in the solid material of the layer. A method of cali...