This article focuses primarily on recent changes to irreparable harm standards, how those changes have altered the patent litigation landscape. This chapter explores the theory behind injunctive relief in patent cases, surveys the availability of this remedy in major patent systems,This part prescribes the policies, procedures, solicitation provisions, and contract clauses pertaining to patents, data, and copyrights. Seller wishes to sell to Purchaser all right, title, and interest in such patents and applications and the causes of action to sue for infringement thereof. This article provides a basic framework for dealing with enforcement of patent rights in light of recent developments in patent litigation. Second, the choice of patent may depend on whether the patentee is seeking a final injunction. How do patent owners exercise their patent rights?