Patent trolls are extreme actors in the patent system. The spirit of patent laws is that it rewards & protect innovation. However the letter of patent law is op

Patent trolls are extreme actors in the patent system. The spirit of patent laws is that it rewards & protect innovation. However the letter of patent law is open to interpretation and unfortunately, abuse. A patent troll, doesn't invent, invest or build. It spends all it's time attempting tot retroactively claim ownership of innovation, through acquisition of junk patents, building portfolios of them and using them to, effectively, extort companies.