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Intellectual Property Defenses, Alex Stein, Gideon Parchomovsky

Alex Stein

This Article demonstrates that all intellectual property defenses fit into three conceptual categories: general, individualized, and class defenses. A general defense challenges the validity of the plaintiff’s intellectual property right. When raised successfully, it annuls the plaintiff’s right and relieves not only the defendant, but also the entire world of the duty to comply with it. An individualized defense is much narrower in scope: Its successful showing defeats the specific infringement claim asserted by the plaintiff, but leaves the plaintiff’s right intact. Class defenses form an in-between category: They create an immunity zone for a certain group of users to …