A newly-revealed patent application shows Apple has evolved its previous hinge designs, and is now describing foldable iPhone displays with far more intricate gearing.A potential iPhone fold using a hinged display mechanismWhen a folding iPhone, iPad, or even MacBook Pro is eventually launched, its fold hinge is likely to look typically smooth and simple. On the inside, however, it now looks as if Apple is at least favoring a design with an interlocking mesh of gearing. Read more