The operating control device can be use on equipment such as hand tools, electronics or fuel pumps. An input device enables the input of user access codes and a readout panel monitors the equipment status. A control member is in communication with the input device, readout panel, power source, driver...http://www.google.com/patents/US6469615?utm_source=gb-gplus-sharePatent US6469615 - Locking device for tools and equipment
