ALEXANDRIA, Va., July 3 -- United States Patent no. 12,343,204, issued on July 1, was assigned to Mayo Foundation for Medical Education and Research (Rochester, Minn.).

"Systems and methods for localizing a medical device using symmetric doppler frequency shifts measured with ultrasound imaging" was invented by Mostafa Fatemi (Rochester, Minn.), Azra Alizad (Rochester, Minn.), Marek Belohlavek (Scottsdale, Ariz.) and Viksit Kumar (Rochester, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Described here are systems and method for using ultrasound to localize a medical device to which an active ultrasound element that can transmits ultrasound energy is attached. Doppler signal data of the medical device ...