This chapter describes how device makers try to leverage intellectual property (IP) rights to restrict repair and why those assertions are, as a general rule, inconsistent with a proper understanding of the law. IP—in the form of copyrights, patents, trademarks, and trade secrets—offers manufacturers an arsenal of weapons in the war on repair. From a practical perspective, IP law allows firms to credibly threaten to enjoin, silence, and ultimately bankrupt anyone with the audacity to repair a product without permission. That’s true despite the fact that IP claims against consumers and repair providers rest on questionable legal foundations.