An anonymous reader writes "Ther'es evidence that Apple's multi-touch patent application may have failed to list some prior art that showed gestures in multi-touch interfaces as early as the mid 1980s. Some of these examples even appear in the bibliography Wayne Westerman's doctoral dissertation, and he's one of the inventors on the application's list. If true, that could leave them wide open for legal attack, should they try suing someone like Palm for patent infringement.
Also, Apple may be infringing some key multi-touch patents owned by the University of Delaware — and co-developed by Westerman while getting his doctorate."Link to Original Source