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Definition[]

U.S. patent law[]

A functional claim is a patent claim that

recites a feature by what it does rather than by what it is. Functional claiming are often viewed with care by patent examiners who are cautioned when claims merely recite a description of a problem to be solved or a function or result achieved by the invention, the boundaries of the claim scope may be unclear.[1]

References[]

  1. "Functional Claim (patent) (full-text).