ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,444, issued on June 23, was assigned to SeeScan Inc. (San Diego).

"Buried locator systems and methods" was invented by Mark S. Olsson (La Jolla, Calif.), Ray Merewether (La Jolla, Calif.), Paul G. Stuart (Spokane, Wash.), Michael J. Martin (San Diego), Christoph H. Maier (Reutlingen, Germany) and Amos H. Jessup (Hillsborough, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Portable self-standing electromagnetic (EM) field sensing locator systems with attachments for finding and mapping buried objects such as utilities and with intuitive graphical user interface (GUI) displays are described. Accessories may include a ground penetrating radar (GPR...