Apple is accused in lawsuit of infringing on Intertrust patents

Apple is famous (or notorious, depending on your point of view) for going it alone on some technologies rather than joining the rest of the tech crowd.

For example, its iTunes store sold downloadable songs for years in a copy-protected format that only Apple's devices could play, and even today it eschews the de facto industry standard for downloadable tracks (MP3) in favor of a far more obscure one (AAC). And although its Apple TV devices can stream video from several sites, they can download them only from iTunes.