The U.S. Supreme Court, ruling that individuals cannot sue a statewithout that state’s approval, has thrown out patent infringement andtrademark violation claims against Florida by a Princeton investmentfirm over competing college-tuition savings plans.

In two 5-4 decisions on June 23, the Court said that even when a stateagency competes in the private financial market, it does not lose its11th Amendment immunity from suit.