Eastman Kodak Co. has lost a patent case against Apple Inc. and Research In Motion Ltd., dealing a blow to the onetime film giant's efforts to raise billions of dollars by selling off its intellectual property.

Kodak filed a complaint against the iPhone and BlackBerry makers at the U.S. International Trade Commission in early 2010, saying their devices infringed on its patent for previewing images with a digital camera. Late Friday, the commission dismissed the complaint, upholding a finding by one of its judges that the patent...