TORONTO (Dec. 13)—AirBoss of America Corp. will appeal a U.S. district court decision that found the firm had infringed on a patent held by Pandrol USA L.P. The U.S. District Court for the Western District of Missouri awarded Pandrol $3 million in damages and issued an injunction preventing Toronto-based AirBoss from making a three-part plastic railway pad. The summary judgment is a reversal of an earlier ruling dismissing Pandrol's suit in favor of AirBoss. In its original lawsuit, Pandrol maintained a railway product made by the rubber and plastics product manufacturer duplicated one of its patented items. The court ruled against Pandrol, which appealed. The district court then reversed its original decision. Robert L. Hagerman, president of AirBoss, called it an incorrect judgment and maintained that during the second hearing the company was prevented from presenting evidence that proved the validity of its patent. So AirBoss appealed the second decision.