ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,493,191, issued on Dec. 9, was assigned to Meta Platform Technologies LLC (Menlo Park, Calif.).

"Multi-directional waveguide eye tracking system" was invented by Mohamed Tarek Ahmed El-Haddad (Redmond, Wash.), Yang Yang (Redmond, Wash.) and Junjie Hu (Bellevue, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A lens assembly for a head mounted device may be configured to in-couple light from an eyebox region using a number of waveguide systems coupled to a number of image sensors, for example, for one or both lens assemblies in the head mounted device. The waveguide systems may be positioned in the lens assembly. The waveguide systems may be configur...