A display unit for use with a surgical navigation system that includes a body; a screen capable of displaying data; a communications link capable of sending and receiving data to and from the surgical navigation system; and an attachment device to attach the display unit to a body of a surgical instrument...http://www.google.co.uk/patents/US20050020909?utm_source=gb-gplus-sharePatent US20050020909 - Display device for surgery and method for using the same
