So? To expand: What is the benefit of giving the patent holder the power to stop others from using the patented technology? If the theory is that it promotes

So? To expand: What is the benefit of giving the patent holder the power to stop others from using the patented technology? If the theory is that it promotes science, how come an implicit license agreement is not enough? And wrt to incentives for innovation. If your only value to the market is your exclusive rights to an invention, I'm Sorry, but you have no value, only a cost.