It's no secret that Nokia's been casting an interested eye upon the tablet market and now we have a bit of extra evidence to show its intent courtesy of the United States Patent and Trademark Office. It has just published a design patent granted to the Finnish company for a tablet device, based on an application filed on May 28th, 2010. Sadly, that date tells us what we're looking at is most probably a shelved MeeGo machine that never made it to market rather than an upcoming world conqueror, but still, here it is f