Corel Corp has been hit by a word processing patent infringement lawsuit from Advanced Software Inc. Advanced claims that Corel’s WordPerfect software infringes a patent taken out by one of its employees, Cary Queen, covering split-screen format comparisons of modified documents. The company has taken a similar complaint out against Reed Elsevier Inc for its CompareRite technology. The patent was first applied for in 1989 and was re-issued in 1998.
