Facebook, the popular social networking site, may soon be squaring off in federal court against claims the site's design infringes on a patent filed several years before Facebook was launched in 2004. Plaintiff Cross Atlantic Capital Partners claims it holds the rights to a patent for an Internet-based "community for users with common interests to interact in" that was invented in 2000. If the suit succeeds, Facebook could be ordered to pay millions in damages and maybe face an injunction that could shut the site down.
Facebook May Face Patent Challenge in Federal Court
The Legal Intelligencer
April 2, 2010