Precedential: Time-Barred Copycat Petitions Only In Exceptional Circumstances

PTAB issued precedential decision in Realtek Semiconductor Corp. v. ParkerVision, Inc. denying Realtek's time-barred copycat petition seeking joinder with pending Texas Instruments/NXP IPR proceedings challenging ParkerVision patent. PTAB established that time-barred parties may join pending proceedings "only in exceptional circumstances," concluding fairness and discretion weighed against allowing Realtek to proceed despite statutory permission for time-barred joinder petitions under § 315(c).