US Patent Issued to 3M Innovative Properties on Sept. 30 for "Hearing protection device, collision warning system and method of retrofitting a hearing protection device with a detection unit" (Swedish, German Inventors)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,426,656, issued on Sept. 30, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Hearing protection device, collision warning system and method of retrofitting a hearing protection device with a detection unit" was invented by Magnus S. Johansson (Jonkoping, Sweden), Abel Gladstone Mangam (Varnamo, Sweden), Patrick R. T. Hjort (Varnamo, Sweden) and Henning T. Urban (Kuehlungsborn, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "Hearing protection device (10, 10', 10") with an indication unit (40a, 40b) and a detection unit (30, 30', 30") to send a first detection signal, to assign a distance value based on a second detection signal ...