Among Apple's granted patents released today, AppleInsider has noted a pair of inventions that appear to be of some interest. The first patent addresses the idea of offline iTunes Store purchases from mobile devices, allowing users to store "credit" that can unlock content already on their devices but not yet owned by the user.In some cases, a user may wish to add new media items to the library, for example from an online media store. When the device is not connected to the store, however, the user may not be able to perform
