A device for guiding an osteotomy to be performed on the proximal end of a humerus that has a proximal sawguide alignable on a selected surface of the proximal end of the humerus for defining a saw line thereon; a radial arm connecting the sawguide to a distal mechanism for stably aligning the sawguide,...http://www.google.ca/patents/US4893619?utm_source=gb-gplus-sharePatent US4893619 - Humeral osteotomy guide
