# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2011-05-16 12:03:18 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/70096984169648130) RT @Zee: Lodsys explains in-app patent warning letters sent to iOS developers http://t.co/JhpOc8V