A therapeutic electronic range of motion apparatus includes a remote subsystem for generating motion commands which are transmitted to a local subsystem at an orthosis, prosthesis or CPM machine. The local subsystem includes a local controller for controlling and monitoring the position, speed, and direction...http://www.google.co.uk/patents/US5252102?utm_source=gb-gplus-sharePatent US5252102 - Electronic range of motion apparatus, for orthosis, prosthesis, and CPM machine