ALEXANDRIA, Va., April 7 -- United States Patent no. 12,593,743, issued on April 7, was assigned to SCHAFFERT MANUFACTURING COMPANY INC. (Indianola, Neb.).

"Trailing arm device and assembly with parallel linkage" was invented by Paul E. Schaffert (Indianola, Neb.), Kris Schaffert (Indianola, Neb.) and Matthew Hornung (Dodge City, Kan.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A trailing arm assembly includes a frame bracket attachable to a planter towing frame, a first frame, and a four bar parallel linkage connecting the frame bracket and the first frame with a first pivot and a second pivot on the frame bracket and a first pivot and a second pivot on the first frame. The trailing arm assembly also inc...