Bloomberg:

Apple Inc. sued Qualcomm Inc. in a U.K. court, adding to lawsuits across the globe in a sprawling battle over patents and licensing fees between the iPhone developer and the largest designer of mobile phone chips.

And:

Apple is separately suing Qualcomm in California, accusing it of monopolizing the market for chips for wireless devices and withholding $1 billion in retaliation for cooperating with South Korean antitrust authorities.

At the heart of the dispute between Apple and Qualcomm is a push by phone makers, with support of some regulators, to reduce the patent royalties Qualcomm charges. Qualcomm gets the bulk of its revenue from selling chips, but more than half of its profit from a separate licensing business.

Sprawling. Exactly.