Apple has confirmed it will seek to add Samsung’s new Galaxy S4 to its ongoing patent-infringement lawsuit against the Korean electronics giant.

In a statement filed in the U.S. District Court in California on Monday, Apple said it has analyzed the Galaxy S4 and “concluded that it is an infringing device and accordingly intends to move for leave to add the Galaxy S4 as an infringing product.”

The Galaxy S4 is set to join a list of 22 products that Apple believes are guilty of infringing iOS user interface patents. Other devices on that list include the Galaxy S II and the Galaxy S III, the Galaxy Note and the Galaxy Note II, and a trio of Galaxy Tab tablets.

But in order to add the Galaxy S4 to the list, Apple must “eliminate (without prejudice)” one of the devices already accused in its complaint. Judge Lucy Koh has also ordered that the Cupertino company must limit the number of patent claims and streamline the case ahead of next year’s trial.

Samsung is fighting back against Apple, of course, and its own long list of allegedly infringing Apple products — which includes the iPhone, iPad, iPod, Macs, and even the Apple TV.

• SourceU.S. District Court
• ViaThe Verge