The America Invents Act established a specialty tribunal known as the Patent Trial and Appeal Board (PTAB) to review the patentability of claims via an inter partes
Tactical Considerations for Patent Owner Responses in IPRs
U.S. Patent Office statistics show that the PTAB has found at least one claim of a challenged patent to be unpatentable in over 80% of IPRs. Given these odds, and the fact that institution of an IPR is not appealable, a patent owner's best shot at preserving its patent rights intact is to defeat institution of the IPR trial in the first instance.

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