In the context of patent litigation and enforcement, “Evidence of Use” (EOU) patent claim charts are visual representations that demonstrate how the claims of a patent are being infringed by a specific product, process, or technology. These charts are essential tools for patent holders seeking to prove infringement.

EOU/IOU patent claim charts are valuable tools for presenting a clear and concise case of patent infringement in litigation. They help both parties in a dispute understand the specific points of contention and can serve as evidence in court.