The purpose of patents has nothing to do with theft or personal property rights. They are a voluntary grant of special protection to the inventor by rest of society; society promises to grant the inventor exclusionary protections for a period of time, after which the idea ceases to be exclusive. That is the reward that society is willing to pay for those of us who use the advantages which society provides to create new things.

At no time does the patented idea become property, and therefore, by definition, it cannot be stolen; every patent holder owes his/her/their patent to society, not the other way around.