On May 31, 2011, the International Trade Commission agreed to institute an investigation regarding Certain Electronics Devices Having a Digital Television Receiver and Components Thereof. The complainant Zenith Electronics, LLC claims that three Sony respondents are violating section 337 by importing devices that infringe claims of U.S. Patent Nos. 5,598,220, 5,629,958, and 5,636,251. The investigation is number 337-TA-774 and has been assigned to Chief ALJ Luckern.