https://finance.yahoo.com/news/apple-allies-seek-billions-u-110130647.html

Filed by Apple in early 2017, the lawsuit in federal court revolves around the modem chips that connect devices like the iPhone or Apple Watch to wireless data networks. Qualcomm has spent the past two years mounting a pressure campaign of smaller legal skirmishes against Apple, seeking - and in some cases obtaining - iPhone sales bans for violating its patents.

The trial before Judge Gonzalo Curiel will play out on Qualcomm's home turf of San Diego, where for decades the city's National Football League team played in Qualcomm Stadium and nearly every business district hosts the mobile chip firm's logo.