ALEXANDRIA, Va., June 16 -- United States Patent no. 12,303,183, issued on May 20, was assigned to Gyrus ACMI Inc. (Westborough, Mass.).

"Staged impedance values to control thermal margins in electrosurgical systems" was invented by Kester Julian Batchelor (Mound, Minn.), Anh Tri La (St. Louis Park, Minn.) and Wayne Williams (Penarth, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatus and associated methods relate to controlling electrical power of an electrotherapeutic signal that is provided to a biological tissue engaged by an electrosurgical instrument during a medical procedure. Electrical power-a product of a voltage difference across and an electrical current conducted by the engag...