NEW YORK (Dow Jones)–Eastman Kodak Co. (EK) shares, cut in half over the past year, have jumped as much as 30% since Thursday because of a favorable patent decision, although questions remain about the ruling's ultimate financial impact and the company's long-term prospects.

Late Friday, the U.S. International Trade Commission elected to review Kodak's patent-infringement complaint against Apple Inc. (AAPL) and Research In Motion Ltd. (RIMM). The decision reverses a January recommendation from an ITC judge who originally found Kodak's patents regarding digital cameras within Apple and RIM mobile devices invalid and not infringed.

Read the full Wall Street Journal story, “Kodak Shares Soar On Patent Ruling, Although Questions Remain.”