ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,408,843, issued on Sept. 9, was assigned to Stryker European Operations Holdings LLC (Portage, Mich.).

"Navigation system for and method of tracking the position of a work target" was invented by Hans Schoepp (Freiburg, Germany), Jochen Breisacher (Teningen, Germany) and Juergen Kaltenbrunn (Loeffingen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "Navigation system and method for tracking movement of a patient during surgery. Image data is acquired by imaging the patient with a base layer of a skin-based patient tracking apparatus secured to the patient's skin. The skin-based patient tracking apparatus includes a plurality of optical surgical...