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US Supreme Court Limits Estoppel Rule In Blow To PhRMA

 
• By Elizabeth Orr

Ruling keeps the principle of assignor estoppel in place, but restricts its use to situations where an inventor’s claims in court directly contradict those in the patent.

Supreme Court and patents
• Source: photo illustration/ Alamy, US PTO

The US Supreme Court preserved but narrowed an inventor’s right to later argue that their patent is not valid in the second high court case this month to weigh on the biopharma intellectual property landscape.

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