Patent trolls have had it pretty easy lately, especially in East Texas. A 2016 ruling by the US Court of Appeals for the Federal Circuit allowed patent suits anywhere a defendant company's products are sold. The Eastern District of Texas has become a favorite of high-tech patent lawsuits thanks to its rapid litigation timetable and plaintiff-friendly rulings. The US Supreme court today may have put an end to such free-range suit practices, however. The justices involved in the patent case between TC Heartland and Kraft Foods ruled unanimously that patent suits can only be filed in courts located where the target company is headquartered.