ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,778,440, issued on Nov. 3, was assigned to St. Jude Medical Cardiology Division Inc. (St. Paul, Minn.).

"Methods for compensating impedance loading effect on electrode locations" was invented by Hai Huang (Woodbury, Minn.), Travis Dahlen (Forest Lake, Minn.) and Ashish Bhargava (Woodbury, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of compensating for impedance loading effect in impedance-based location system includes determining a geometrical center for a grid of electrodes attached to a distal end of a catheter shaft, the catheter shaft further including at least one shaft electrode and an electromagnetic sensor; determining a first ...