Qualcomm is probably the largest maker of mobile processors in the market, which pretty much means it has a large target painted on its back. It isn't a stranger to lawsuits, even those brought against it by government. But when Apple joined the fray, it took on a slightly different story. Last January, Apple sued Qualcomm for, among other things, unfair licensing costs and retaliation. Now Qualcomm is fighting back with claims of its own, saying that Apple was, in fact, the one using shady tactics to harm Qualcomm's business.