ARTICLE · 13 SEPTEMBER 2024

Back To The Future: Expert Can Be Skilled Artisan Based On Later-Acquired Knowledge

McDermott Will & Emery

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The US Court of Appeals for the Federal Circuit clarified that a technical expert does not need to have been a person of ordinary skill in the art (POSITA) at the time of the invention.

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The US Court of Appeals for the Federal Circuit clarified that a technical expert does not need to have been a person of ordinary skill in the art (POSITA) at the time of the invention. Instead, they may rely on later-acquired knowledge to offer testimony from the vantage point of a skilled artisan at the time of the invention. Osseo Imaging, LLC v. Planmeca USA Inc., Case No. 23-1627 (Fed. Cir. Sept. 4, 2024) (Dyk, Clevenger, Stoll, JJ.)

Osseo owns patents related to orthopedic imaging systems that use X-ray beam techniques to create tomographic and/or densitometric models of a scanned object. The alleged invention date of the patents was 1999. Osseo sued Planmeca for infringement of dental imaging systems that generate and display 3D models to a user.

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