In a recent decision in August, T923/08, a Technical Board of Appeal (TBA) had to decide on a method for measuring parameters on a human or animal body, in particular measuring the length of a femur. For this method a device is essential, which is connected to the body, for example to a hip bone, in a surgical step. As this step is completed before the measuring of the parameters, it is not part of the measuring method and thus, is not a feature of the claim. The TBA, however, counters that, as confirmed by the applicant, the measuring method would not be possible without the bone-fixed device. Therefore, according to the TBA, the surgical step is an indispensable part of the claimed method and has to be incorporated into the claim; otherwise, the claim lacks clarity and is not allowable.