Sorry, you're reminding me how we're in a little world here and we get used to certain things, one of which is non-practising entities. This is a reference to firms that obtain a patent pool—a bunch of patents—and their business is to monetize those through lawsuits, through litigation, through settlements, rather than actually inventing or marketing the things that are covered by the patents.
On May 10th, 2012. See this statement in context.