ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,721, issued on May 27, was assigned to Good RV Equipment INC (Bellingham, Wash.).

"Single axle suspension system and associated methods" was invented by Yanfeng Cui (Marysville, Wash.) and Kelly Zuoer Cui (Marysville, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A suspension system for a trailer and associated methods are provided. In some embodiments, the suspension system includes (1) one or more first shock-absorbing components; (2) a second shock-absorbing component; and (3) a connecting member configured to position and connect the first shock-absorbing components and the second shock-absorbing component. The connecting member includes ...