Samsung, Fujitsu and Apple are rushing to file patents on it. (canadianbusiness.com)
That is pretty cool, but doesn't Sony have patents on something similar to this? (n4g.com)
ShareRoller uses friction drive to power the front wheel of your share bike, and attaches to the bike in a most ingenious manner (so much so that we've filed patents on it!). (treehugger.com)