Criminal sentences are NOT about revenge. Or at least they aren't supposed to be in theory.
Actually...there are many theories as to the purpose of criminal sentences and laws. We spent the first half of my Criminal Law class my 1L year in Law School discussing them. And revenge is most definitely a theory beyhind criminal law. It may be a bit out-dated, but it is there and there are many people who subsribe to it.
Suing people is kind of the point of patents. Someone else uses the same idea, you get to use the force of law against them, assuming your patent is valid. Otherwise, I don't think there's a point, save for defensive purposes.
I think the point would be to license the patent instead of sitting on it and suing people when they infringe.
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