ALEXANDRIA, Va., April 9 -- United States Patent no. 12,269,333, issued on April 8, was assigned to ENOW SYSTEMS LLC (Warwick, R.I.).

"Trailer frame rail suspension for electric and hybrid transport" was invented by Ryan Kennedy Kemmet (Phoenix), Jeffrey C. Flath (Warwick, R.I.) and Robert W. Doane (Harwich, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A self contained battery and slide frame houses a pair of trailer axles and an electrical vehicle storage battery secured by parallel slide frame rails adapted for attachment to an underside of a standard tractor trailer (Class 8) trailer frame. The slide frame attaches to an underside of a trailer using perforated frame beams used to vary a position o...