My friend and colleague Charles Arthur, Technology Editor at The Guardian has posted an insightful article on the Apps blog section of The Guardian relating to patent fears reaching ‘tipping point’ in the US. Charles says, "App developers are withdrawing their products for sale from the US versions of Apple’s App Store and Google’s Android Market for fear of being sued by companies which own software patents – just as a Mumbai-based company has made a wide-ranging claim against Microsoft, Apple, Google, Yahoo and a number of other companies over Twitter-Style feeds, for which it claims it has applied for a patent’. You can read the full article on The…