The curved screens of Samsung's Nexus S and Galaxy Nexus helped them stand out in the smartphone crowd, but it's clearer than ever that the company doesn't have a lock on the idea. Apple is exploring the concept as well: it just received a patent for a technique that molds thin glass into bent or curved shapes without a drawn-out process or using risky chemicals. By having alignment tools shift along with hotter temperatures during a glass slumping proce