ALEXANDRIA, Va., June 12 -- United States Patent no. 12,295,494, issued on May 13, was assigned to LIPPERT COMPONENTS MANUFACTURING INC. (Elkhart, Ind.).

"Sofa bed with glide system" was invented by Patrick Hutmacher (Grayslake, Ill.) and Chuanrong Heng (Chaohu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sofa bed with three moving seat bases that transforms between a bed configuration and a sofa configuration. The sofa bed includes supporting legs and armrest. Each of the seat bases, and corresponding cushions, are located between the armrests. The seat bases are interconnected with a set of slide rails that allow the seat bases to move relative to one another. The sofa bed also includes a lockin...