Evidence of Use (EoU) helps patent owners identify potentially infringing products in the marketplace. Our EoU charts patent claim elements to specific features of identified products and services, and provides an indication of the strength of patent infringement assertion.
An EoU investigation is critical prior to embarking on a patent assertion campaign. With the increased scrutiny being placed on patent owners to conduct infringement due diligence, an EoU investigation can help patent owners identify likely infringement versus potential infringement based solely on the claims as they read.
For patent investors, an EoU investigation may prove useful to understand the scope of infringement of a potential patent investment, and coupled with a Damage Modelling Assessment, may provide price guidance and an indication of future revenue potential of the patents at issue.
When Doing Your Own Preliminary Patent Search, Use This as a Guide.

Written by Patent Attorney J.D. Houvener, this updated edition provides inventors, entrepreneurs, and startups with practical guidance for protecting ideas, avoiding costly mistakes, and navigating the patent process with confidence.
Whether you’re exploring a new invention, building a startup, or preparing to file a patent application, our team is here to help you move forward with confidence. Get personalized guidance from experienced patent professionals who understand the challenges inventors face.