Evidence of Use (EoU) is a type of analysis designed to protect the IP and related interests of patent holders and investors. Its primary goals are to identify products, processes, or services in the marketplace that potentially infringe on the patent in question and to evaluate the strength of the patent assertion campaign. A thorough understanding of patent infringement is foundational to an EoU analysis. Generally, patent infringement refers to the act of making or using a patented product, process, or service without permission from the patent owner. Whether non-commercial use constitutes an infringement depends on the specific country or region where the patent was issued. Patent rights are territorial and the exact definition of infringement may vary by jurisdiction. Besides identifying likely and potential infringers, EoU can also give an indication of a patent’s future potential, provide information necessary for the creation of a sales or licensing agreement, and help patent owners build a viable and sustainable R&D plan.