Research In Motion has learned that <A HREF="http://www.rim.com/news/press/2006/pr-01_05_2006-03.shtml">a complaint alleging patent infringement</A> has been filed against them in the U.S. Eastern District Court of Texas by Visto Corporation. Visto is alleging infringement of four patents and seeking an injunction and monetary damages. Visto has already filed patent complaints against several companies in the industry, including Microsoft, Good Technology, Smartner, and Sproqit. Visto filed its complaint against RIM immediately following a jury verdict in its litigation against Seven Networks. RIM has been monitoring Visto's litigation against other companies in the industry and, based on prior art and actual products in market, RIM believes Visto's patents are invalid.