There are people who specialize in evaluating patents and being the middleman if they believe there is value in licensing and/or asserting your patents. They are often thought of as just another breed of patent trolls.
Because agencies specialising in licensing a patent (i) are non practising entities, and many people's view a troll is pretty much defined by the concept of acquiring IP without the intention of doing anything with it other than seeking fees, and (ii) occupy their time sending legal threats to firms already using aspects of the patented invention rather than delivering sales pitches to people searching for technological breakthroughs, because "the right to develop your own technology which does X using Y" is a really hard sell.
'Genuine' with respect to patents is a very low bar. They've issued patents on any number of scientifically impossible inventions, in spite of rules against that sort of thing. So the courts are usually required to sort it out after many years and endless litigation.
