Unpatent careers

Unpatent is a crowdfunding platform to invalidate bad patents.

Unpatent crowdsources the search of prior art (any evidence that a patent is not novel) and conducts reexaminations before the PTO, automating the process.
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.