> As for success histories WIPO has a collection here
WIPO is funded by patent registration fees. Everybody that sells something has a success story or two to provide. Moreover, in the examples I read, there wasn't evidence that patents helped (like "if patents weren't here, it would never have been done").
From what I read in this article, the guy spend 10 millions dollar in legal fees to win against two "infringers". Sure he was the underdog, but
1. I'm not sure how anyone could find 10 millions dollar to spend in legal fees
2. He didn't use a lawyer in the second trial (lowering the cost, but I sure couldn't do it)
3. Only two "infringer" went to trial and they're not especially significant (looking at the streets here, I see about 10% Ford vehicle and maybe 0.01% Chrysler)
And for the record, I don't even find this invention to be that inventive in the first place.