20110237981 | MEDICAL DEVICE AND METHOD FOR OPERATING A MEDICAL DEVICE - The application pertains to a medical device including a treatment unit for treating patients, an activation device for activating the treatment unit, and an input device for entering an activation code, the input device being coupled to the activation device, and the activation device is arranged to activate the treatment unit for a limited number of treatments and/or for a limited period when a predetermined activation code is entered via the input device. | 09-29-2011 |