Key Takeaways -
- A recent Federal Circuit decision in a case involving an inter partes review (IPR) significantly narrowed a patentee’s ability to rely on estoppel to block a defendant from raising invalidity grounds.
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The judicially-derived patent-law doctrine of “assignor estoppel” prevents an inventor from assigning a patent to another for value and then later arguing in litigation that the patent is invalid. In Minerva Surgical Inc. v....more