Law Commons^™

Explaining The Demise Of The Doctrine Of Equivalents, David L. Schwartz

All Faculty Scholarship

This article provides a novel theoretical model and extensive empirical evidence to explain the decline of a historically important patent law doctrine known as the “doctrine of equivalents.” In recent years, distinguished academics have studied the doctrine of equivalents. While these scholars noted that the doctrine of equivalents had decreased in its successful use and provided some grounds for the decline, none clearly explained why. As such, the cause and precise mechanism behind the so-called “demise” of the doctrine of equivalents have largely remained a mystery.

This article explains that the demise occurred because of two complementary forces discussed for …