Apple has lost its appeal over a ruling that its rival Samsung's Galaxy tablet did not copy the iPad in a London court.
The world's two leading smartphone makers are fighting over patents, both for smartphones and for tablets, in courts around the world.
The Court of Appeal upheld its judgment that despite some similarities, Samsung did not infringe Apple's design, in part because its products were "not as cool" as the iPad.
The US company was instructed to run ads saying the Korean company did not copy the iPad, both on its website and in selected newspapers. Judge Kitchin said that the notices must be in a font size no smaller than Ariel 14.
"We continue to believe that Apple was not the first to design a tablet with a rectangular shape and rounded corners and that the origins of Apple's registered design features can be found in numerous examples of prior art," a Samsung spokeswoman said. "Should Apple continue to make excessive legal claims in other countries based on such generic designs, innovation in the industry could be harmed and consumer choice unduly limited."
Apple has not commented.