By Bruce Rubinger and Brendan Sever November 30, 2020 (updated January 12, 2021) Introduction Inter-partes reviews (IPRs) have transformed patent strategy, providing a low-risk and (relatively) low-cost way to challenge the validity of patents. As of Sep 30, 2020 nearly 12,000 IPRs have been petitioned before the PTAB since the AIA went into effect. [...]