ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,843, issued on July 1, was assigned to Katcher LLC (Round Rock, Texas).

"Using artificial intelligence (AI) to detect tunneling and other activities" was invented by Jace W. Files (Round Rock, Texas), Roger S. Hollander (Austin, Texas), John Trevor Morrison (Round Rock, Texas) and Shivshanker S. Naimpally (Leander, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "In some examples, a sensor node is mounted to a structure and includes a microphone that is coupled to the structure. The sensor node records, at a first time, first audio data, using the microphone, filters the first audio data to create first filtered audio, records, at a second time t...