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This Article traces the evolution of the definiteness requirement over the course of two centuries. From the time of inventions relating to flour mills, the definiteness requirement evolved into the consequence for drafting uninterpretable claims. Without considering the reasons for this evolution, the Supreme Court in its Nautilus decision returned the standard for assessing definiteness to its root form. Given the consequences are the loss of patent rights, this Article grapples with the Supreme Court’s decision during an era where complex and convergent technologies are more commonplace. The Article also analyzes empirical evidence six years before and six years after the Nautilus decision to forecast its impact as we head deeper into the Fourth Industrial Revolution.



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