The U.S. Patent and Trademark Office’s patent trial board found Friday that Amkor Technology Inc. hadn’t shown 14 claims in a Tessera Inc. patent related to semiconductor chips to be unpatentable, shortly after a California state court confirmed a $128.3 million judgment for Tessera in a separate case.

Tessera is represented by Jon Wright, Robert Greene Sterne and Jason Eisenberg of Sterne Kessler.

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