Grove has introduced its new SkateBack protective back plate for the iPhone 4 and iPhone 4S. Made from 100% post-industrial skateboard material left over during the manufacturing process, the SkateBack attaches to the rear of the iPhone via peel-and-stick 3M adhesive, and has precision-cut holes to allow for access to the rear camera and flash. Grove’s SkateBack back plate for the iPhone 4 and iPhone 4S is available in three color schemes and…