An endoscope used for observing the interior of a cavity in a human body. In the endoscope according to the present invention, an image sensor is provided in the forward end of an insertion section and an object of interest is displayed on a screen of a television set in response to a video signal obtained...http://www.google.ca/patents/US4697210?utm_source=gb-gplus-sharePatent US4697210 - Endoscope for displaying a normal image
