ALEXANDRIA, Va., April 2 -- United States Patent no. 12,265,163, issued on April 1, was assigned to Science Applications International Corp. (Reston, Va.).

"Navigation system" was invented by George Fortney (Toms River, N.J.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Location may be determined in a way that does not primarily rely on jam-able or spoof-able techniques. For example, an apparatus may have multiple location-determining units, each unit having a different level of trust. One unit may have a first (e.g., highest) level of trust, a second such unit may have a second (e.g., medium) level of trust lower than the first level of trust, and a third such unit may have a third (e.g., lowest) level of ...