Gear4’s new Buckingham ($70) is a stylish new folio case for the iPad mini 4 that uses D3O’s patented technology to provide “military grade” shock absorption and impact protection without adding extra bulk to the case. The iPad mini fits snugly into the base of the case, which provides full side and top button coverage as well as a raised edge at the front. The folio cover and rear of the case is made from a sleek, matte black…