ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,558,558, issued on Feb. 24, was assigned to ZOLL Medical Corp. (Chelmsford, Mass.).

"Portable medical treatment apparatus with interactive guidance and cardiopulmonary resuscitative functionality" was invented by Gary A. Freeman (Waltham, Mass.), Christopher L. Kaufman (Somerville, Mass.), John P. Pierson (Tewksbury, Mass.) and Kristopher M. Edgell (Shreveport, La.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A portable medical treatment apparatus and interactive application that leads a user through a medically acceptable query flow for treating medical emergencies, including cardiac or pulmonary medical emergencies that can be treated with electroth...