ALEXANDRIA, Va., July 28 -- United States Patent no. 12,691,820, issued on July 28, was assigned to THE FRED M. KEMP FOUNDATION (St. Louis).

"Continuous rail and airborne rail transit alert system for pedestrians, vehicles and animals" was invented by Fred M. Kemp III (Warson Woods, Mo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An alert system for railed vehicles than can operate continuously or nearly continuously to warn pedestrians, vehicles and animals. In one embodiment, the system has a transmitter in close proximity with one or more rails for applying energy to become a medium for the energy that is felt or heard at a warning distance. In another embodiment, a transmitter is mounted on a train to...