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Burden of Proof › Patent Ownership › Patent Infringement

Knobbe Martens

Collateral Estoppel Does Not Apply When the Prior Proceeding Applies a Lower Burden of Proof

Knobbe Martens on

Because there are different burdens of proof in IPRs and district court, collateral estoppel does not preclude a patent owner from asserting claims that are immaterially different from claims canceled in an IPR....more

Snell & Wilmer

Federal Circuit Holds Patent Owners Bear IPR Estoppel Burden of Proof

Snell & Wilmer on

The Federal Circuit recently held, for the first time, that patent owners bear the burden of proof for an Inter Partes Review (“IPR”) Estoppel affirmative defense that an alleged infringer failed to include prior art in a...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

Patent Rights in the U.S.: Is the Pendulum Finally Swinging Back to Center?

Sterne, Kessler, Goldstein & Fox P.L.L.C. on

The U.S. patent system has long struggled to strike a balance that both encourages patent rights and prevents patent abuse. Finding that balance requires giving patent owners the right amount of patent enforcement power,...more

McDermott Will & Emery

Burden on Motion to Amend in IPR

McDermott Will & Emery on

Applying its own precedent, the US Court of Appeals for the Federal Circuit confirmed that the burden remains on the patent owner to demonstrate the patentability of substitute claims over the art of record in an inter partes...more

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