Executive Summary
POSCO Co., Ltd. successfully petitioned the PTAB to institute an IPR against ArcelorMittal's patent, demonstrating a reasonable likelihood of prevailing on all 25 challenged claims. The Board found sufficient evidence across multiple grounds of obviousness (103) involving various prior art combinations.
Practitioner Note
This case demonstrates the evidentiary and procedural standards applied in patent matters before local courts. Understanding the court's reasoning in POSCO Co., Ltd. et al. vs ArcelorMittal is valuable context for structuring arguments or assessing risk in similar proceedings.
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