Patexia, an intellectual property company that performs analytical studies for IP-related issues, named Buchanan IP as a Top 5 law firm for inter partes review proceedings. Patexia ranked Buchanan IP as the 2nd best performing firm representing patent owners and the 4th best performing firm overall.

An inter partes review (IPR) is an adversarial proceeding conducted before the Patent Trial and Appeal Board (PTAB) in which a petitioner challenges the validity of an issued patent. In the last five years, IPRs have become a popular choice for contesting the validity of issued patents. According to the PTAB's most recent statistics, over 9,500 IPR petitions have been filed since September 2012. IPRs serve as a faster, more cost-efficient alternative to contesting the validity of issued patents in district courts.