I would argue that if his IP was protected he would sit on a temporary monpoly and only a handful of car manufacturers that directly license the wipers from him

I would argue that if his IP was protected he would sit on a temporary monpoly and only a handful of car manufacturers that directly license the wipers from him directly could build them. Instead every car manufacturer build them benefiting everyone. Developing IP is expensive but protecting it is even more expensive. Imagine a company invents a cancer curing drug but it cost them 10 billion dollars in R&D. They get their patent but then their competitor spends another 10 billion dollars in R&D to make their own cancer cure that doesn't infringe the previous patent. I think we should have a patent system where when a company creates a patent and it sets the price of the patent to the cost of the R&D (plus some profit) and all buyers will own the patent collectively. The cost is evenly divided across all buyers. Initially the first company that buys the patent pays 10 billion dollars covering the R&D costs. If a competitor buys the patent they will only have to pay 5 billion dollars which then are used to reimburse the first buyer so both only have to pay 5 billion dollars. The third pays 3.33 billion dollars which again are redistributed across the previous buyers. And so on.