Apple has a long history of taking a technology created by Xerox and transforming it into the heart and soul of computing, such as the mouse or the concept of a graphic user interface. Now comes word Apple owns a Xerox patent for location based services. The patent could prompt Apple to sue a wide array of companies, ranging from Android-backer Google to social networking giant Facebook and any others relying on the ability to check users’ location.
Apple Gets One Last Nuke From Xerox: A Killer Location Patent That Could Toast Facebook, Foursquare, Google, Etc.

