— A federal agency that oversees trade disputes said Wednesday it will investigate Eastman Kodak Co.'s patent-infringement complaint over digital-camera technology used in iPhones and BlackBerrys. The U.S. International Trade Commission in Washington will weigh whether to block imports of the smart phones after Kodak alleged Apple Inc.'s iPhone and Research in Motion Ltd.'s camera-enabled BlackBerry models infringe on a 2001 patent covering ways to preview digital images. Patent cases can take years to resolve, and agreements over licensing and royalty payments often emerge. But the trade commission, which can order Customs to stop imports of products made with contested technology, is seen as a fast-track mediator that typically resolves disputes in 12 to 15 months. In December, after a yearlong legal tussle, Kodak negotiated royalty paying deals with South Korea's Samsung Electronics Co. and LG Electronics Inc.