A recent Newsweek article has been making the rounds claiming, through an unnamed Apple "insider," that Apple has spent north of $100 million litigating its various grievances against HTC since late 2010. Verifying the accuracy of this number is pretty much impossible. But that doesn't really matter. It may just as well be $80 million, $150 million, or $300 million - the conclusion drawn would remain the same: Apple is spending quite a chunk of income on its growing lawsuit habit.
Apple currently has open suits against Motorola Mobility, Samsung Electronics, and HTC in the ITC (International Trade Commission), a number of US District Courts, and various other buildings in which judges are known to sit in ornate leather chairs for long periods of time around the world.