The US Court of Appeals for the Federal Circuit determined that the limitation “a pH of 13 or higher” could not be construed using the asserted patents’ intrinsic evidence and therefore remanded to ...

Last year, the Texas Supreme Court adopted a narrow exception to the state’s eight-corners rule, and allowed the consideration of extrinsic evidence to determine the duty to defend. The exception ...

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In his Evidence column, Michael J. Hutter discusses two issues arising under New York law governing impeachment: the ban on the use of extrinsic evidence that contradicts the witness's testimony on a ...

“We find that this case is one where the proper claim construction cannot be reached without the aid of extrinsic evidence, and that the district court should have considered, at minimum, the textbook ...

The Massachusetts Appeals Court has ruled that extrinsic evidence could be used to prove the validity of a will signed by the testator’s conservator under the conservator’s mistaken belief that his ...

There is a high-stakes game going on, pitting insurance companies against their policyholders in a series of important coverage issues pending before the Texas Supreme Court. And the first point has ...

We collaborate with the world's leading lawyers to deliver news tailored for you. Sign Up for any (or all) of our 25+ Newsletters. Some states have laws and ethical rules regarding solicitation and ...