Here's another one of those patent drawings, this one by LG Electronics which has claimed the idea of a "drawer-type" handset. You push a button and tiny gears slide the cover up to reveal the keypad, while extending the antenna at the same time.
With this design, LG hopes to eliminate that problem of candybar cellphones, where the microphone is not close enough to your mouth, while also eliminating the shortcoming of clamshell phones where they're not easy to open with one hand.
Notice the cover has a transparent window through which you can see the LCD when the cover is closed. It looks like the only catch with this design might be that it acts like a finger guillotine, sliding down and pinching your finger. Ouch.
LG Develops the 'Drawer' Phone [Mobiledia]