ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,731,481, issued on Sept. 8, was assigned to Proxense LLC (Bend, Ore.).
"Proximity-sensor supporting multiple application services" was invented by David L. Brown (Chattanooga, Tenn.) and John J. Giobbi (Bend, Ore.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A personal digital key (e.g., which can be carried by a human) contains a memory having different service blocks. Each service block is accessible by a corresponding service block access key. As the personal digital key (PDK) moves around, it is detected by sensors. The sensors report position data, thus enabling location tracking of the PDK. The sensors also provide a data path to various applica...