Why patents are not proof

Patents describe inventive claims and intended mechanisms, not verified outcomes. They matter because they define what a device says it does, but they do not constitute independent efficacy evidence. The USPTO explains that a working model is not ordinarily required.

Three dominant device categories

What counts as real evidence

Common evidence gaps

How this guide treats device claims

Every device claim is mapped to its source type: patent, independent test, or marketing copy. A patent is primary evidence of the patent record, not of performance. If a claimed outcome lacks appropriate test evidence, the guide labels that outcome unverified.