ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,736, issued on Oct. 21, was assigned to SYSTRA (Paris).
"Ballastless track section for a rail vehicle" was invented by David Vian (Paris), Youcef Alloui (Merignac, France), Mathilde Le Guennec (Paris), Marcel Girardi (Ifs, France) and Jerome Olive (Paris).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a ballastless track section for a rail vehicle, said section being fastened to a platform (10) and comprising: a prefabricated concrete track slab (20, 120) comprising two stringers (21, 22); a rounded bearing surface (21c, 22c) borne by an underside of each stringer at each longitudinal end and having a curvature, the center of...