ALEXANDRIA, Va., July 16 -- United States Patent no. 12,356,978, issued on July 15, was assigned to Valmont Industries Inc..

"System and apparatus for providing variable rate application of applicants to discrete field locations" was invented by John Kastl (Wahoo, Neb.) and Jacob L. LaRue (Owasso, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a system, method and apparatus for providing variable rate application of applicants to discrete field locations. According to a first preferred embodiment, the present invention includes a control device having software modules to allow for the execution of irrigation and chemical spray patterns according to specific prescriptions ...