ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,431,883, issued on Sept. 30, was assigned to ALSTOM Holdings (Saint-Ouen-sur-Seine, France).

"Pulse width modulation system provided with synchronized control boards" was invented by Johann Galic (Surahammar, Sweden), Magnus Bergman (Vasteras, Sweden), Torbjorn Trosten (Vasteras, Sweden) and Mikael H. Johansson (Hallstahammar, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A pulse width modulation system includes a plurality of module building blocks One control board is a master control board and others are slave control boards. Each slave control board determines a fictive master board timer based upon timer information received via a communic...