While the Patent Trial and Appeal Board (PTAB), a part of the United States Patent and Trademark Office, uses the “broadest reasonable interpretation” for inter partes review proceedings (IPRs), district courts apply the “ordinary and customary meaning” standard for civil litigation. The disparity between standards in similar adjudicatory proceedings is not explicitly justified by existing law and creates uncertain outcomes for practitioners. This note explores the usage of the broadest reasonable interpretation in IPRs, the problems created by dichotomous claim construction standards between the two forums, and possible avenues of correcting this disparity. The Supreme Court acknowledged the issue posed by disparate standards by granting certiorari in Cuozzo Speed Technologies, LLC v. Lee. Therefore, this note argues that the Supreme Court, in this case, ought to require the PTAB to use the district court’s “ordinary and customary meaning” standard.