Patently Apple has sniffed out the latest, and most comprehensive, trademark registration acquired by Apple on the subject of the iPhone and we thought we'd have a peek. Already entitled to use the brand name under international categories 9 (mobile phone and digital audio player) and 38 (electronic data-transmitting device), Apple has now added category 28, which reads shortly and sweetly as a 'handheld unit for playing electronic games.' Before you freak out and start fusing this into your iPhone 4G fantasies, note that Apple filed the claim for this trademark way back in December 2007. So nothing necessarily new on the tech front, but this document provides the broadest brand protection yet -- including the bitten apple graphic alongside the name -- and could strengthen Cupertino's case in its forthcoming battle for the iPad moniker.