The portable device includes: a first casing; a second casing; and a hinge which joins the first and second casings, the first and second casings being capable of turning on the hinge to open and close with respect to each other, wherein when the portable device is in a closed state where the first and...http://www.google.de/patents/US7856258?utm_source=gb-gplus-sharePatent US7856258 - Portable device
