Incipio has announced a collection of new ClamCase iPad keyboard cases for the iPad Pro, iPad Air 2, and iPad mini 4. The new cases incorporate the signature, patented 360-degree hinge design from the previous models, while adding more productivity-enhancing features such as backlit keyboards and backup battery power. The ClamCase Pro for iPad mini 4 ($130), expected in Q1 of 2016, features a Lithium-ion battery and Bluetooth 3.0 chip for months of…