ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,730,208, issued on Sept. 8, was assigned to ORANGE (Issy-les-Moulineaux, France).

"Method for detecting the presence of a person using a communicating device within an environment of interest" was invented by David Excoffier (Chatillon Cedex, France) and Dinh Thuy Phan Huy (Chatillon Cedex, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for detecting presence of a person using a communicating device connected to a wireless communication network, within a determined environment in which a radio-frequency tag configured to backscatter ambient signals is located at a known geographical position. The method includes: transmitting over the wi...