Smartphone maker HTC Corp sued Apple Inc, claiming infringement of three patents through Apple's sale of Macintosh computers, iPads, iPods, iPhones and other devices.
The lawsuit filed in U.S. District Court in Delaware seeks to halt Apple's importation and sale of infringing products in the United States. It also seeks compensatory damages, triple damages for willful infringement and other remedies.
Tuesday's complaint escalates the legal battle between the companies. Apple has accused HTC of patent infringement through its smartphones, and filed several patent lawsuits against the Taiwan-based company in Delaware in the last two years.