In 2006, the District of Maryland granted summary judgment of patent invalidity and entered final judgment of dismissal of Dr. Frank T. Buckley, Jr.’s patent infringement suit against Klarquist’s client Freightliner LLC. Dr. Buckley subsequently agreed to surrender his right to appeal. Dr. Buckley’s patent, which issued in 1981 and expired in 1998, had been the subject of six different lawsuits against a dozen different defendants over the last 25 years. Represented by Klarquist, Freightliner was the first to prove that the Dr. Buckley’s patent was invalid.