Bloomberg Law's article $1.1 Billion CalTech Infringement Win Shows Patent Board Perils reminds inter partes review (IPR) cannot be a reflexive choice to a patent infringement suit.
Specifically, if an IPR petition fails before Patent Trial and Appeal Board (PTAB), a court may estop the petitioner from challenging the patent validity on same grounds or grounds that could have been reasonably raised. Apple is expected to appeal to the Federal Circuit.
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