The suit was initiated in a Wisconsin federal court on May 15, the same day that the Singapore-based electronics maker said it hadin U.S. District Court in California, seeking an injunction against the iPod and damages.
In its complaint, Apple accuses the company of infringing on four of its patents related to user interfaces and icon displays for digital media players. The company is requesting monetary damages and an injunction barring continued use of its patents.
In a separate complaint with the U.S. International Trade Commission filed this week, Creative is also seeking an injunction that would stop Apple from selling the iPod and iPod Nano in the United States.
Creative's complaints center on a patent describing a system for organizing music and songs used in its Zen MP3 player, which the U.S. Patent and Trademark Office. The company's chief executive that he planned to assert the company's patents against suspected infringers and seek royalties.
Apple declined to comment on Friday. Creative did not respond immediately to requests for comment.