Unpatent

Unpatent is a crowdfunding platform that crowdsources the search of prior art to invalidate bad patents. Prior art is any evidence that a patent is not novel and therefore shouldn't have been granted. A large number of patents are stupid or obvious and they're actively used by patent trolls, extorters that acquire cheap patents and sue companies with them. Trolls take $29bn/year from the American economy, and have wasted more than $21bn from the VC industry.