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Case Law of the Boards of Appeal

 
 
6.1.3 Repeatability

An invention may also be sufficiently disclosed where results are not exactly repeatable. Variations in construction within a class of genetic precursors, such as recombinant DNA molecules claimed by a combination of structural limitations and functional tests, were immaterial to the sufficiency of disclosure provided the skilled person could reliably obtain some members of the class without necessarily knowing in advance which member would thereby be made available (T 301/87, OJ 1990, 335).