Anyone who invents something and then patents and licenses it without owning the factory is a patent troll the way you're defining it. The problem is that the

Anyone who invents something and then patents and licenses it without owning the factory is a patent troll the way you're defining it. The problem is that the patents modern trolls abuse are garbage patents that don't promote innovation. Some are overbroad or obvious. Most are directed to math and computer software, a field totally incompatible with the patent system. Over 90% of programmers with an opinion prefer only copyright and trademarks to apply to computer software. The patent lawyers were thirsty to bleed software companies dry and pushed their system where it isn't wanted and now we have to suffer the consequences of having little influence in Washington to defend ourselves.