According to United States Federal Circuit jurisprudence, patent applicants may not easily avoid this restriction by merely referring to some trivial use.213 The patent applicant would have to disclose the particular function for which use of the EST or SNP is intended, and the scope of the patent would be limited to this specific use. In the public health context there are several cases under which the choice of a broad or a narrow approach will have important implications on the availability of pharmaceutical substances for generic production. These cases will be presented in the following sections.