One of the great things about patent lawsuits is that companies like Apple unleash photos of prototype devices that have never seen the light of day. The Verge has uncovered a great collection of iPhone designs that have never been seen outside of Apple's walls.
The designs range from an octagonal shaped iPhone with a silver bezel to a slim, tall profile device known as the n90. If this number rings a bell, it might be because early rumors of the iPhone 4 leaked this model number. The n90 pictured is quite different from the iPhone 4 that made it into production.