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Validity Assignor Estoppel

Patterson Belknap Webb & Tyler LLP

An Unforeseen Obstacle: Consultants Can Prevent Validity Challenges Through the Use of the Assignor Estoppel Doctrine

Imagine hiring a consultant who designs a process, only to find that the process infringes a patent invented by the same consultant owned by someone else. How much worse would it be if your use of that consultant prevented...more

BakerHostetler

Patent Watch: Semiconductor Energy Lab. Co. v. Nagata

BakerHostetler on

"[Neither the Declaratory Judgment Act nor Federal Circuit jurisprudence creates] a federal cause of action for assignor estoppel." On February 11, 2013, in Semiconductor Energy Lab. Co. v. Nagata, the U.S. Court of...more

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