From http://www.zdnet.com/intweek/stories/news/0,4164,2453891,00.html

"E-Pass Technologies, a developer of smart-card technology, said on Monday that it has filed a patent infringement lawsuit against 3Com.
According to E-Pass, 3Com's Palm devices infringe on E-Pass' 1994 patent for a multifunction, credit card-sized computer that allows users to securely store account numbers and passwords of credit cards, identification cards and other personal documents. "