Businesses founded on intellectual property (IP) licensing need their lawyers to be as smart as their engineers as they seek to defend and enforce their rights. However, mobile processor IP giant ARM’s decision to sue one of its largest customers, Qualcomm, is a particularly high-stakes move, especially as Qualcomm itself has a huge licensing business whose legal department is rightly feared. ARM, which is still owned by Japan’s Softbank following a failed attempt to sell it to Nvidia, filed a lawsuit last week against Qualcomm and Nuvia, the advanced CPU developer that Qualcomm acquired at the start of 2021. ARM claims that the companies have broken the terms of their licensing deals and used ARM trademarks in relation to…