Apple has famously shunned the humble stylus, so it's fair to say we're more than a little curious about why it's filed a patent application for one. The "optical stylus" mentioned seems simple enough. The claims outline the brains to interpret your doodlings, as well pressure and orientation. Beyond that, well, it's more or less just a stylus. While we suspected the team at Cupertino were fans of Draw Something, we didn't think they'd take it this seriously!
